I bought a MiST, I haven't even gotten it set up with an ST yet, to me the original hardware still seems more enjoyable somehow, though it would be awesome fore some of the game console cores.
What would be awesome is a stanaldalone vampire with the capabilities to run all the same cores that are available for the MiST, with some of the same extensions, so if wanted a Mege Mega STe, I could. MiST can do a 68020@25 for it, apparently.