need help with decision w/ gh3

i personally wanna get GH3, but something is just holding me back from running down to the store and picking it up.

for a college kid, $100 is quite a steep price tag, but i havent exactly indulged myself in video games for the 360, i only own gears of war and bioshock. hopefully get AC and ME later on this month.

also as a college kid, i dont exactly have a whole lot of freetime on my hands anymore, and i feel if i get addicted to gh3, it'll derive me away from my studies (more specifically i have a a big test coming this week =p)

but i'm a huge gh fan. i own both 1 and 2 for the ps2, have at least 4 starred every song on expert, and i still play them.

so someone, tell me if i should go and buy it now, or wait a couple months, or just plain not get it at all. im indecisive at the moment and i need some enlightenment =p