Yea, I forgot to mention the post above I did was for MAME roms, but hey, I suppose it worked rather well... there haven't been too many posts here lately.
Though I come again with more good news. Emureactor's message board has a veritable motherlode of links which you can find
here.
This one is VERY helpful because they've all been pre-tested and ranked, so it's very systematic and thorough. Happy hunting.