Dont know if you raid etc, but we plan to do this too, and the mobs just before cho'gall, they drop alot of epics, well for us every week without fail 2-4 epics just from mobs before cho'gall.

need to finish 2 bosses tonight in BWD, then we are off too Bot, and usualy down 3 bosses and getting close too killing cho'gall, so no doubt we wil get upto it, but wont kill it, and next raid is Monday after tonight so leaves the cho'gall trash free for us too have a go at lol.