Last year we built a new home and went with the Monogram. I wanted the handles, gas stove and the 240 Advantium. We are now currently building our 2nd new home, but I am preferring the Profile's handles this time.. and just don't feel the price difference is worth it, since I have been told that they really are identical, except for exterior features and price.

Regarding reliability, I haven't heard anything much bad about any of the three (Miele, E'lux, Advantium). What I can tell you about the Advantium is not so much the tech (which I regularly forget), but the capacity. Mine is the really big 240 Pro (yes, one thing I chose for appearance was no black control panel). For oven mode: I have a big Pyrex baking dish that's more than 17" long including the handles. It fits in fine on the rack, with room for two or three 8-10" casseroles on the turntable. All heat evenly. The convection works fine in that regard. :) I haven't used it in there yet, but my 16" pizza pan also fits on the turntable. So far, I'm mot too impressed with the speed oven outcomes. They're okay. Can't beat the time. But they don't compare to what I can produce in a real oven. I'm no expert, and reluctant to use the speed feature unless I "have to" because why chance it on an experiment? The microwave works really well, including the first defrost setting I've had that really works on things like bagels without ruining them. The popcorn sensor is unnecessary, but it also works really well. Since it's my third oven, I don't use it for a lot of heavy cooking. As a holiday oven it's excellent. I don't know much about stacking ovens (my new kitchen has my first stack, and they were made to be stacked), but I'd think you should be able to stack two different makes of ovens if you have an inch or two of cabinet between. One piece of wisdom I learned here is to have a special, easy access place for the Advantium trays. I don't know if this applies to the other makes as well. My Advantium came with three metal trays (one with grill ridges), one glass, and one wire rack that spans the width of the oven. GE makes an accessory drawer, but it's expensive and I don't think it would even hold the rack. I had a shallow drawer made as part of my cabinetry that's right under my Advantium. It holds all the trays, the wire rack, a couple of MW dish covers, and some potholders. A section in a vertical tray cupboard would work fine as well. What doesn't seem to work, is a standard bottom, under-oven drawer, which is low, and usually has other things in it. What doesn't work is a tray cabinet in another part of the kitchen. What people say about the things that don't work is that they're so inconvenient the owners can't be bothered switching them. What I find most convenient, since I usually leave the glass tray in the Advantium, is to put it on my island across the aisle for the duration that one of the metal trays is in use. OTOH, it's pretty easy to take out a metal tray, leave the drawer open, switch the trays, close the door, and put the glass in the drawer. My tray drawer sits with its bottom at counter level, with my warming drawer just below that (at top drawer level), and the Advantium above. This puts the Advantium at perfect height for me (I'm 5'8"). I don't have to bend a lot to see in, but it's still low enough to be a good height for lifting things out (lifting things down is harder). You could do the same thing with your oven where I have my warming drawer. That would be about the standard height for a lower oven, right? And if you're tall, you could put the whole stack a few inches higher. Surely having a drawer between would be enough separation that you could put any oven you wanted under any speed oven you preferred?

GE Pofile line has the 240v Advantium (GE Profile Advantium Series PSB9240) and the matching single wall oven (GE Profile PT7050) Both ovens can be seen on the this link: GE Profile 240 Advantium and Profile wall oven I would not buy the combo unit. It's much easier to deal with any possible issues of a single appliance than when it's in a combo unit. In a combo if one fails you might have to replace the whole combo unit rather than just the one appliance. I have an Advantium Profile and separate Profile wall oven but to save money I bought the 120v Advantium. Since I have never used the 240 I can't compare so I have to say the 120 works fine for me. Others on this forum think the 240 is the way to go. My Profile Advantium and Profile wall oven are just over 5 years old. I've had no problems with either. They changed the style of the Profile right after I bought mine but here's what my mine up look like.

Another advantage is that you can mix and match. Maybe that doesn't feel important right now, but in the future, you might find that you absolutely need another feature (combination steam would be the most obvious candidate). If that requires replacing a single appliance, it might be in budget. If it requires replacing two appliances, most people wouldn't do so. And in fact, you could even do that right now. You don't really have to buy both appliances from the same manufacturer. If -- just to pick a random example -- you prefer the GE Advantium and the Miele CSO, there is not reason why you couldn't do that. Visual experience won't quite match; but I bet you really don't care after a few months. Functionality trumps most of this.