I followed this flash tutorial :
and applied the trick which consists in dropping one after the others the folders containing the updated roms directly onto the log window that pops up after a ClrMamePro scan.
So you guys are happy about MAME accuracy and ordinary MAME romsets, apparently. I know for a fact dlfr bought a few Arcade boards (was the brand name Jamma ?) and plays some classics without the cabinet. If I could, I'd do the same for Xevious and Street Fighter EX (one of the SF in 3D).
My partial (and probably biased) conclusion is that the less the game is detailed and graphics intensive, the easier it is to spot inaccuracies.