If you find yourself "collecting" these I'd recommend at least 1 that has short, arcade style high-score game play. It really helps change up the dynamic of whatever game room you have them in.
The only machines I'd personally pass on are Space Invaders (It's 1 game, sadly not a great deal even discounted unless you're going to mod it), Golden Tee (personal pref), and any trackball game that isn't the 12-in 1.
If I saw the Final Fight cab I'd pick it up pronto for the other games included in it. Street Fighter and MK would likely be last on my list along with Pac-Man. I'm debating if I want Star Wars or Marvel; I'm happy that Marvel is a fighter/side-scrolling beat em' up with The Punisher; then again it'd be nice to have a totally different game/control scheme like Star Wars. Let's hope for some kind of black Friday deal.
The only one I'd personally be interested in is Golden Tee. Does that one ever go on sale? Looks like it's crossed out in the original post here and it's still $400 at any that show up on brickseek near me.