My only issue with the Aug (TM) is part of its charm. Being a bull pup it takes some practice to get good at changing mags. The long barrel makes it a serious threat at long ranged.
I have no experience with any other brand but would recommend the TM in a heartbeat.
You know, there's like a butt-load of gangs at this school. This one gang kept wanting me to join because I'm pretty good with a bo staff.