hello people
i'm thinking to get a 360 (maybe in 6 months time, not now ) to play some exclusive titles like gears of war trilogy, forza motorsport series, halo series
i would like to try kinect also


currently got a PS3 for its exclusives

which version should i get?
2nd hand: jasper 120gb
New: the 4gb version or 250gb+kinect version?

bigger HDD has more advantage as no need to worry running out of space for installation files?

thank you in advance for all your feedback