I have to say that I have used both eheim and fluval over the years, and I cant honestly say that one is better than the other. they both have good and bad points. my 6x2x2 is run on the fluval fx5 and its great, I had a problem with it when I first bought it, and that was when it turned itself off, it didn't turn back on? I spoke to fluval, and they sent out a new motor with chip, no questions asked, and it arrived the day after, special delivery.
I also have a eheim ecco 2233 that runs my external heater * not needed for filtration* and I also had problems with that, when I switched it on, the pressure was actually forcing the handle out from the sides and forcing the top off, now that caused me many sleepless nights. I dissmantled the unit and now its been running for a couple of months without further problems, touch wood!
I run a 2x2x2 with the eheim 2215, great filter, crap clips holding the top on, and these have a tendancy to pop, the hoses can work themselves loose from the canister.
so the motto of the story is..... go for jebo, I have heard of them and as far as I know, there ok. probably get a couple myself. I am thinking of setting a sump up, and just using the eheim for heating and airiating.