I used to run for years ,,the Emperor series filter's by Marineland and liked them alot ,but the Aquaclear
110'S and 70's that I now use are much easier to clean.
No cleaning of the spray bar's,no cleaning /replacing the little plastic bearing's that help keep the biowheel turning smoothly and frequently became mysteriously lost, and more room for media.
I also love the Eheim Canister's.
I WOULD like to see larger diameter opening's for intake on the Aquaclear, for it does not take much to clog it in my planted tank but I have remedied this by placing prefilter over the intake after lopping off about one inch with a hacksaw.
Doesn't seem to be an issue in unplanted tank, but free floating$!@!! Baby tear's ,courtesy of my sister donating some plant's while I was out,precipitated the modification for me.
Aquaclear 110 pushes more water than any other HOB filter I know of, and you all know how I LIKE flow.