Everyone I dive with uses Scubapro Jet fins for back mount and Dive Rite's plastic fins for sidemount.
Same here except.......I use Dive Rite's with my overhead back mount setup. For a little more clarity, my setup is double AL 80's with a V weight and a 8/7/6 tech semi dry suit, that puts me pretty much neutral trim. The lighter weight Dive Rite's work well for me with this setup. I think if I were using steels with my semi or diving dry, I may go with the heavier Jets. You can't go wrong with either the Jets or Dive Rite.