MAMEWorld Forums - The Loony Bin - N00B Dad Mame Setup Help

So I've spent the last 6 months slowly building my son a full-size arcade cabinet and I am finally to the part of configuring the PC, and getting the MAME games setup (in Launchbox).

My problem is that, with Mame 0.220, I have a ton of games, many that won't play, many that are specific to certain controls (I don't support - e.g. trackballs), missing CHD's, etc. Most likely a large portion of the few thousand games wouldn't ever be played (Launchbox does filter out some based on criteria).

Is there an easy way to get a list of top ~200 popular Mame games, that work, including any additional bios/CHD's needed OR put the list together easily?
(how does Killer Instinct 2 come out with a Mame set, but doesn't include the CHD required to play?)

I am trying to get this arcade cabinet completed for his upcoming birthday, and it seems like the Mame portion is the biggest hurdle.

Suggestions?