I've never tried the ultra classic. I don't think the build quality is really that different between them. You kind of can't go wrong with these things. They are excellent keyboards. When people talk about the lesser build quality, it's only really in reference to older, original model Ms. It's not that the Unicomps are bad, it's just that the original model Ms are even better. When choosing between the classic or the ultra classic, it's more down to personal preference, aesthetics and space on your desk.