Ive been using a Rio 800, actually quite a good little pump. Good water pressure thru a standard Waterbloc/res/Rad. Its not too noisey, as long as you dont have it up against something solid, otherwise it gets a whole lot louder.
I screwed a 3/8th(thread) to 1/4 inch barb into it and it squirted water about 3 feet into the air.
If you do get one, be VERY careful that u dont run it dry or in a system with too many bubbles, the ceramic shaft is VERY fragile. So make sure its well submerged with no bubbles in the impellor compartment, otherwise it'll vibrate too wildly for the shaft and it'll snap. Like it did with mine...
Anyone know how to fix ceramic pump shafts???
I got mine for about 60ish NewZealand, which is about $35US