We have the 5x10 Silver Shadow - they say it's a queen sized bed, but I don't think the length is the same as a standard queen. I'm 5'9, Ed's 5'11 and we're comfortable, but our GSD sleeps in a crate in the van (she thinks 3 in a bed should look like an "H" instead of "III")
Here's the thing, though - if you like the Silver Shadow, you might be able to get Little Guy to make you a 5x10 without the headboard storage area. That would give you probably another 6-8 inches. You'd have to check with them about what to do about a mattress, but I'd give them a call.
Oh, and your marital height differntial isn't as bad as my cousin and his wife - he's 6'5, she's under 5'0.
