Personal opinion having never owned any of them, but have put hundreds of games on most.
Godzilla - does everything right, shots, sounds, art, rules, immersion, the works. The best I've ever played.
Jaws - best theme ever for me, love the modes, shots, callouts, and the code is getting better and better. The one I would buy first.
Kong - Has the potential to be the best. Shots and combos are fantastic, and it just flows. Lack of tie in license helps it, not as restricted as it could have been. Forthcoming code may push it higher
Jurassic Park - tough, but awesome game. Art package is bad, but the game is amazing. Has that one more game appeal.
Maiden - Hated it the first 30-50 games, grew to really appreciate it. Such a good game, with amazing combo potential.
Bond 60th - The odd one out. Completely different from the rest, but a great game. No ramps, no toys, just a clean shooter. Watching Mr Elwin play it at the UK Open was a bit special.
AIQ - The weakest of the bunch, but still a very good game, just up against some of the best ever. Brilliant shots, but everything else is pretty ropey. Art package, sounds, theme integration is all missing.
I agree with
@roadshow16 that we are trying to rank some of the best ever games against each other. Elwin just gets pinball, and pinball players and is an absolute genius