Well there are plenty of options for back training. It all just depends on your equipment and other exercises. I like to do reverse grip (underhand) bent-over rows but that tends to be a bad idea after deadlifts and power cleans so I opt for exercises that allow me to support my chest while I row. A new exercise I discovered recently is the J-Rope Pull. It his the middle traps in a unique way. It’s like combining a DB pull-over and row into one movement. I learned about it here:
I also like to do reverse fly’s for back training to help balance out my pressing. I’ll do the regular motion which tends to hit upper traps, lats, and rhomboids. On other days I’ll emphasize the rear delt by stopping before those bigger muscles engage. This is usually with my arm straight in front of me like locking out a bench or push-up. Going slow and concentrating on the rear delt helps get it to do the work.
Lee Boyce has some pretty sweet stuff for back training that consists of exercises that aren’t so mainstream and common.