I wanted the biggest bang for the buck.   I was able to find a cheap 27" TV with s-video out at Wal-mart for $189.00.  I also purchased a 27" monitor bezel from Happs and when it arrived I  noticed my first problem with this cabinet.  The monitor bezel did not fit neatly against the TV screen.  So I searched and did a lot of messaging in the Mame newsgroup, I got suggestions from taking the TV out of the case, to just leave it like it is and you won't notice.  Well after lots of taking the TV apart and looking inside, I chose not to remove it from the case, but to instead take a Dremel around the perimeter of the screen and remove the part of the case that was causing me the trouble, allowing the bezel to fit tightly to the screen.  I am glad I took this risky step.  This made for a much better  appearance.  The second problem I ran into was turning the monitor on.  It came with a remote, but the IR doesn't work through the plastic bezel.  I chose to cut an 1/8" hole directly in front of IR sensor on the TV this will allow full function of the remote and is hardly noticeable.  The third problem with using a TV was mounting the TV securely to the cabinet.  I used 6 "L" brackets, 2 in front, 2 on the sides and 2 in the back. then used rubber coated cable and turnbuckles to securely lock the TV into place.

The TV sits behind a Happs 27" monitor bezel, so the Dremel cuts and cable are not noticeable.

The second picture is with the monitor bezel in place and with 1/4 round holding the glass in.  In the ultimate arcade 2 plans, it recommends using plexiglass and drilling 16 holes around the perimeter of the glass and bezel to secure it in place.  I definitely didn't want to see screw holes and I didn't want to use plexiglass, I am around plexiglass at work all day, and it tends to scratch easily, while cleaning and also clouds over time. 

You also can't see where the IR sensor hole was cut, it is in the bottom left corner, about 8 inches from the side of the cabinet.