[quote name='samuraixyz']OMG, do not get the PS3 version. It's a very crummy port made by SEGA. I highly recommend the Xbox360 version unless you're a PS3-only user; it's doable but noticeably lags while the Xbox360 is just silky smooth.[/QUOTE]
As some one who has played the pre-patched PS3 version, post-patched PS3 version, and X360 version, I have to tell you that after the patch, the PS3 version is really good and comparable to the X360 version. The patch eliminated all pointless load times (when picking up items, before Alfheims, etc.) and significantly shortened level load times. The "lags" you're referring to are framerate dips, which happens on both the X360 and PS3 versions, especially during the latter parts of the game where the action is high and intensive. The only real difference between the PS3 and X360 version is the occasional screen tearing on the PS3 version, which is minimal and doesn't take you out of the game.
Overall, $32.99 for this game is a steal, regardless of which system it's for.