I'd go with the 902 on sheer weight alone. If you're a college student who has frequent vacations (i.e. every 5 weeks) a 1200 fully loaded is going to be a PITA. I should know I've carried my roommate's twice and it sucked going up three flights of stairs. Nearly dropped it once.
My old 900 doesn't nearly weigh as much with roughly the same amount of stuff in it. If you're using a 10.5" video card, you can always slide the hdd cages forward about 1/2", to where the grill plates are flush with the case front. My 900 fits a GTX 260 quite nicely. I bet the 902 is roughly the same idea.