ive got the Danner 350GPH mag-drive pump. bought it from
Petsmart's website. it runs quiet, costs a lot less than an ehiem, its also smaller. you'll need to seal the housing with some sort of silicone sealant (otherwise it'll slowly leak).
oh, its rated @ 350GHP @ 1' head; 375GPH @ 0' head.
ive heard about ppl's impellers rattling (fixable) and craking the housing. :shrug: