Do yourself a favor and buy either a Lim dragon pump or a sequence. These tend to be the brands used by 80%-90% of serious hobbyists. I'm not even suggesting they are the supreme winner of amongst all choices-- ( although I could argue they are ) But i will say that they are tried and true after 15 years use in the high end of the koi hobby.

If Cap and Tade does come thru ( we'll know after the elections in Nov) then we all will be scambling for new pumps ( maybe inline pumps will become popular again? JR