I'm very interested in the upcoming/just released Space Invaders Extreme. It's fast, has incredible music and seems to be the perfect game for playing in quick bursts when I'm taking a break from MGS4 (or anytime). Also its only USD 20 (+shipping).
Now here's the question: Which version do I pick?
The DS version, with the pros being slightly catchier music and the chance on diverting online and offline multiplayer - although with not much substance or longevity to it as I've heard. The cons would be the smaller screens, simpler graphics and the cramp inducing DS Lite design.
Watch it here:
The other option is the PSP version, with flashier graphics, a nice big crisp screen and the pleasure of a much nicer to hold PSP, with the downsides being a little less interesting (but still very awesome) music and no multiplayer for me.
Watch it there: