Many months later, but I would do it, and I like an arch at the top. I would say about twice as tall as the original pass thru. That is, the pass through should be at least as high as the door beside it, maybe higher. Anyhow, what did you do?

Whether to go down to counter height with the opening: Are you tidy? Do you leave things around the sink and will it bother you to see the backs of the things you leave around the sink from the other room? If you want to have a bit a screening around the sink I would leave it and you can create a countertop ledge/bar area at the higher level, the seating would have to be bar stools, not counter stools. If you don't want any screening of the sink from the other room, open it down to counter height.

Thanks all for your replies. Unfortunately, they cant be returned. I remember him telling me as well before I left the deposit that any changes need to be made before a certain date. They are made as ordered. Well, that date is long gone. MalhGold, the cabinets arrived this Wednesday and are being held at the kitchen warehouse. Im actually holding them up. I went CRAZY looking for my discontinued existing tiles (they are 5 years old). I didn't want to break out my existing tiles as this project is an extension from my current kitchen and needed matching tiles. Well, the Tile guy found the tiles in Italy, and not sure how many Italians are on here, but some of you may know, nearly the entire Italy takes off from work in the month of August. No joking. Everything shuts down. He put the order in but missed the ship, so its now another 5 weeks before the tiles arrive!! Beats having to rip them out and put new I guess. Weissman, nice kitchen! What is the size of your opening? Also, is that a standard size range you have and who makes it? Choux. I thought about that. Do the top cabinets need to be ordered to have doors on both sides? Or can they be modified? Thanks all! Your opinions are a big help! By the way, these are my actual cabinets taken from the manufacturers site. I was trying to create something like that on the right of the picture with the space between the upper and lower cabinets, though this is pretty much different setup.

You want the cut outs in the granite made in the shop on the CNC machine or with a water jet. Jimmy and his grinder on site are going to have to make the stone significantly weaker to get a nice square. You don't want "square" square either. A bit oversized with radii in the corners is much stronger, like the bit on a CNC machine would make. I broke a backsplash while removing it because of the over-cutting that was done by hand to make the duplex receptacle hole. Fortunately this stone was quite forgiving.