There is no FAQ (to my knowledge) like that... plus it would be very cumbersome to look through all the games in MAME IMHO.
The best advice I can give you after seeing this question so many times, is focus on a few versions of MAME.
If you have a very old system, most people would recommend using Vantage. I'd say anything under 300mhz or so... someone running it please chime in and fix this, I've never personally used a much older system. You might be able to run MAME .36 on a system like this also (??)
In the 500mhz to 1ghz range, a lot of people seem to recommend .36 or .55 .36 and .55 seem to have been pretty significant releases, so they are mentioned a lot.
For your system, i would put MAME .55 on it. I have a 900mhz bartop downstairs that runs .55 and almost every game runs perfect. There are only a few trouble games in .55 (MK I think?) but I just deleted those games after reading they might cause trouble, and after I tested them myself.
There haven't been a ton of good games added in since .55 IMHO, so you really won't be missing out on much. Hope that helps.