Aside from the occasional lag (which happens regardless of the card, I've got a GTX 580 @ 800mhz core), the game is amazing. Having played both console versions the choice is clear - just make sure to hook up your 360 controller! You'll be able to play at 1080p resolutions or better, get 60fps and much better anti-alliasing. The added framerate does wonders for the expressive animation. Not to mention the price, $25 vs. $50.

As for the game itself, it's the best Sonic since Sonic 3 & Knuckles! The only minor quip I have is that Classic Sonic's rolling physics aren't quite up to snuff but it's miles beyond what we saw in Sonic 4. Anyone touting the greatness of the Adventure games is blinded by nostalgia or was very young when those were released. Everything beyond Sonic/Shadow levels was poorly executed, not to mention the godawful camera.

Don't be dissuaded by accusations that the game is short, there's a slew of challenges which put a spin on each level to the point of completely altering the gameplay. I've clocked 12 hrs on the PC and have quite a few challenges to go!