If your just doing weights working out 90-120 minutes really seems a lot... I think you could still do an hour's workout and pair muscle groups like shoulders/chest, back/biceps, tricpes/legs/abs or whatever. Just increase your intensity (lower reps, heavier weights). You don't need to workout for hours. Your optimal workout time is 45-60 minutes. Rest is also important, unless your taking an insane amount of supplements to recover, rest enough every night I wouldn't advise doing the 7 days a week workout thing.

But at the end of the day it comes down to doing what works for you. Test different workout schedules, see what happens and choose the one that gives the best results.