You can't go wrong with Miele. Their condenser dryers work just as well and as fast as their vented models. You might also want to look at the Bosch Axxis line of laundry appliances. My MIL has had an Axxis laundry pair with a condenser dryer for about 3-1/2 years. She's been very pleased. A couple of things you might want to consider before going with a combo machine. Typically, you can only dry loads that are half the size of a maximum wash load. That means if the machine can accommodate a 12 lb. wash load, you'll only be able to dry 6 lbs (dry laundry) at one time. You'll either have to remove half the wet wash load before starting the dry cycle, or you'll be limited to half-size wash loads if you want the machine to automatically switch to the drying cycle after the wash cycle. Be sure to ask about this when buying and consult the owner's manual. Salesmen are notorious for forgetting to mention this little detail. Also, the combo machines generally aren't as fast at drying a load as a stand-alone condenser dryer. Some can take up to twice as long. And finally, if you typically wash multiple loads in succession, doing laundry with a combo machine will take you much longer. You won't be able to move a load of washed laundry from the washer to the dryer, then start a new load of wash while the first load is drying. You'll have to wait for the first load to wash AND dry before you can start a second load. Hope this helps.

All combo washer/dryer in one are mediocre at best. That includes the one or two Miele makes and doesn't market in the US. Problem is that a washer can wash far more than a dryer can dry in the same drum space. It takes room for tumbling to take place to allow clothes to dry. The combo units are the size of a 6 kilo washer drum and no more. So you end up with very small loads that take a long time to dry. If you're doing underwear and towels for one person maybe it would be almost okay. But anything more in terms of load, and you're asking for trouble. Buy separate units if you have any way to fit them in. Ventless or condenser dryers work well. They're quite common in Europe and becoming more usual here in the US. They work by heating the clothes far hotter than a standard dryer, and then condensing the steam that rolls off them and pumping it into the drain or storing it onboard the dryer and signaling you when it's time to empty the water storage unit. Condenser dryers also take longer to do a load of clothes and you MUST le them go thru their cool down cycle or the damp hot clothes can give you a nasty steam burn! Most have locking doors that won't open until the contents have cooled enough to avoid injury to the user. . . so to recap, they're slower, hotter, and cost more to run because of the heat and the fact they run longer. BUT IF YOU HAVE NO WAY TO VENT A STANDARD DRYER, they're much better than hanging clothing in the bathroom to dry! We had one in Europe for three years and got used to it. Ours was a Miele with a matching washer and worked great. The condenser unit has to be pulled out and cleaned every now and then (once every month or so) and a light and signal tell you when. It's not an awful task but it does take fifteen or twenty minutes to get it right. One of those things the maid will never do properly. Like changing the bag in the vacuum. Just doesn't seem to occur to household help for some reason! The ASKO high end Washer and Dryer are said to be great design. They seem to have service problems sometimes and ASKO service is spotty in the US. Make sure you have factory service available in your area before you pop for the two grand the washer can cost. Also, get the super-extended waranty on Asko products from ASKO. A five year service extension is like $300 if purchased at the time you buy the washer. Well worth the money, I'm told.

Asko would seem to meet your requirements. Possibly Miele also, at a somewhat higher price. Asko T712 dryer, W6222 washer, for example.

The Bosch 500 has AquaShield The Bosch 800 has AquaPlus The Bosch 300 only has a reinforced hose Living on the 10th floor, leaks are of supreme concern. Does anyone know the difference between AquaShield and AquaPlus. I know that both of them claim to shut off the water automatically if they sense some kind of malfunction in terms of water levels or leaks but is the AquaPlus in the more expensive Bosch 800 better than the AquaShield in the Bosch 500? I don't see any other differentiation in specifications but all things being equal if the water leak protection is better in the Bosch 800, it is worth the extra $200 for that kind of peace of mind. Thanks.