I would buy an MX5000 if they started making them again. I think part of the problem is that ergo designs aren't very popular. It seems to me that keyboard enthusiats covet space saving designs, and ergo 'boards hog space almost by design. The MX 5000 is one of the better ergo designs space-wise, but it is still kinda large. The only other thing about the MX5000 is that it is kinda ugly. The Topre, Filco, etc. probably wouldn't be too excited about it, either.