I run 2MJ1200's in a closed loop from my overflows, 2 MiniJet 606's in back corners for circulation, and a modified MJ1200 for 1800gph of flow, and my return pump from the sump. It all totals about 3500gph in the DT. I keep mostly SPS and LPS, some Zoo's and shrooms too. The Hydor Koralia pumps look pretty decent for lots of flow, kind of like Tunze stream pump. I'd say they all do the job, just find some that look good to you. Maxi Jet, Koralia,Seio super flow would be the best bets,IMO.
Matt