I think you've done an excellent job in thinking through what you really want from a tent, and made a very good decision to go with a two person tent instead of a solo tent. (I prefer solo tents, and never thought about suggesting a two-person version.)

The Seedhouse might be a very good answer to your needs. There are some other possibilities, too, which I'm sure others will point out. Since you're not restricting yourself to only ultralight models, you might check out the MSR Hubba Hubba - it's been a while since I looked at it, but it wouldn't hurt to compare weight and price to the Seedhouse, if for no other reason than to ratify your choice of the Seedhouse.

If you're thick-skinned, go ahead and throw your gear list up. Otherwise, just follow the pattern here for each item as you get ready to replace it.