Actually I prefer the Fluval 04 series to the filstarts, just personal preference really. I hated the 03 series, although they had a much nicer rim adaptor then the 04's.
I like my magnum 350 as well, although the cost of replacement parts is simply ridiculous ($35 for an impeller magnet!).
I'm thinking about re-doing the filtration on the 135 gallon with Eheims, but the availability of parts is limited :-(