I use lots of different filters. I tend not to use UGF or RUGF, although I have a couple of them. I overfilter all tanks, and I almost always have two or more filters per tank. I try to separate mechanical and biofiltration.
For smaller tanks, I tend to use HOBs, mostly Emperors or Penguins, although I have a few AquaClears and a Whisper or two (that won't be replaced when they die). Larger tanks generally have one or more Eheim canister packed as bio-only, with mechanical filtration provided either by HOT Magnums or a variety of internal filters. I have an Eheim 2229 wet/dry on my 180, but I think it's pretty much overkill for most tanks.
HTH,
Jim