in my day i was a 5'11 160 pounder. as far as bags went, i hated the light ones. as soon as i hit the thing it would shoot across the room making it impossible for me to punch through the target. i found this to severely hinder my form in the punch. consider this; in punching a man in his solar plexus, does his body remain in place as you punch it, or does it suddenly shoot across the room as soon as your fist glances it? for this reason my bag of choice (and my best freind for many years) was a 200 (but probably somehwat lighter) soft-fill heavy bag that i called Hellen. let me tell you she was great. i wouldnt mess with any other bag but her.