your looking for a vanilla rom you can find different ones on xda just look for one
here is a great link for the best bench mark test rom
[UPDATED December 19] Which is the best WM6 ROM? Benchmarks of 44 ROMs + links - xda-developers
want to try a vanilla try this one
[Updates Made] Pandora Naked ROM - xda-developers
Vanilla roms are no less stable actually they are usually faster
havent tested this one yet, not sure exactly whats on it, sometimes with vanilla roms they will have nothing!!!!!!!! make sure you have cabs. ready as some dont have anything!!!!!!! meaning no pie, media player, camera functions, no office, no games... depends on version I have a few cabs. on hand pm me if you need some.
nate