Any prior experience with pumps and brewing? I just did my first batch with one last weekend and the main issue was clogging from the hops and hop seeds.
I'd suggest nailing that down before actually trying to brew since it will become a nightmarish hassle if you don't.
As it is when I get my stand built there will be two pumps as well.
Whole hops (or bitter orange peel)+pump=bad brewing day
You can use a coarse hop bag, anything to keep the big crap out of the impellers. I use pellets and have no issues with clogging, although I have not tried to recirculate anything with more than 40IBUs worth of hops. When I do I'll probably use a hop bag for the bittering addition.