The winner is RandyT with a perfect score!!!
1 - B W-G 9100
2 - E NEC through composite
3 - D NEC through s-video
4 - H Toshiba through composite
5 - F Viewsonic A90F
6 - C NEC through RGBS
7 - A W-G 7901
8 - G Toshiba through s-video
A few stats...
Correct pair matched most frequently: 5-F (12 matches)
No surprise there, I guess. Pretty much everyone has played MAME on a PC monitor.
Correct pair matched least frequently: A-7 (3 matches)
This did surprise me a bit, I must say. I would have bet a lot of people would have matched that one first because of the soft, fuzzy, and familiar look to it.
This was not an easy contest, and I'll admit it myself! Now which monitor is the best solution for a MAME cab? You be the judge.

Any comments/questions/complaints/etc... please feel free.

RandyT - I will PM you to coordinate your prize. Congrats!