After looking at everything, I think I'm going to go with the more expensive cabinet. For one thing, it's in MUCH nicer shape cosmetically (looks basically new), has a better looking monitor (medium as opposed to standard res on the other), and since I don't like sports games, I won't care about removing the JAMMA PCB and putting it on eBay. As far as the control panel goes, I already have some joysticks I can install in there, and I'm planning multiple swappable control panels anyway. I'll keep one of the 49-way sticks in case I ever run across a Sinistar PCB.
Also, the game installed on it is NFL Blitz 2000 Gold/NBA Showtime 2000 Gold combo. Someone is trying to sell the kit for an $850 starting bid on eBay now (and failing). I figure the joysticks and game will sell for more than the cab is going to cost me.
Although it *would* be nice to have the CPS2 board to plug new games into . . . oh well, if it's still there in a few weeks I'll get the SF3A game too.

Thanks again for all the advice guys. I think I'm going to get some more good deals from this guy in the future. He has something like 175 games in storage right now.