I say, build whatever you want.. and dont let anyone else dissuade you.
If you get a 37" or larger widescreen lcd, you should have plenty of screen for the game...
and additionally, will play many other great widescreen games much better,
such as TX-1, many of the Darious games, and even the 2player driving games.
4 player games will also be more comfortable to play, due to the extra space of the CP.
If you do make it... make sure that you make a way to fit it thru doors. Detachable control panels, possibly multi-part cabinets that come apart.