I like the APT harness.... it's not as nice as the Iron Mind, but it's only $70....
Bands are amazing, I like chains too, but the cost is WAY higher per pound than bands...
grip toys like the grenade ball and stone trainers
For what it's worth, I've tried both the ram, super ram, and all three types of slingshot and I really prefer the slingshot or maddog slingshot....