ESP,FLX, Z and champion all are good plastics to me. I really like the flx because it is grippy and can take a beating. I recently bought some r-pro bosses and I like the feel but contrary to my first experiences with it, it does get beat up in the woods a bit. Took a couple to idlewild and well they got beat up a bit. They still fly good but have a few good nicks in them.
Love Z and esp, flx is pretty cool but I have found out that I have to get some pro D for the rain cause when its pouring rain and the only disc you can hold onto is your putter its makes for a loooong round. oh and hate champion, star is pretty good