I use 2 Eheim ProII 2028's. Awesome filters so far. No problems whatsoever. Very easy to prime (just push a button). They were a bit pricey but they do an awesome job.
Used a Fluval 403 for years. The impellor got noisy about 3 years ago, pretty sure it was damaged because no amount of cleaning helped, but it still ran fine for 3 years even though it rattled like crazy!
Am in the process of replacing it with a home made wet/dry sump filter as its not big enough for my tank/fish anymore.
I have also used a couple of smaller Eheim units (not sure of model), pretty much the same as the Fluval in operation/maintenance.
I use JEBO. Very good filtration and are REALLY quite, i got a 1500lph one running my 70g which is a metre away from my bed and i sleep at night like a baby.
AND they are very good priced compared to well known brands!
I used magnum 350s in the past, provided adequate flow, but needs cleaning all too often. I currently run 2 fluval 404 on my 75g piranha tank, no media except floss...sometimes carbon....all my other tanks....SUMPS. Much better than all the rest