I like using the "pond" versions of most all submersible pumps I buy... the big difference is usually a nicer input screen and a substantially longer cord, usually like 20' or so.
If you want my advice on a "good" return pump you will be very happy with, I'd recommend looking at a Pan world or Sequence external pump. more energey efficient, more powerful, and they won't add heat to your tank like a submersible pump will.
Good Luck!!