I have to say I think an Eheim 2217 does a MUCH better job than a 305. There's a lot more media space inside the 2217, and I personally love how the solid waste settles to the bottom in a 2217- i backflush my filter by letting water from the tank run through it backwards and siphon into a bucket and all of my fry come popping out along with a TON of waste. I had a 2217 and a cheap powerhead on a heavily stocked 60 gallon (SA cichlids, gar, and polypterus were growing out for the 90 and they ate a lot of feeders) and it kept it SPOTLESS, but a 75 I cleaned with a 405 on it was always filthy, and the 405 was a lot harder to tear completely apart, compared to my eheim that I backflush and change the top polishing pads every few months. Takes me 10 minutes, where the 405 needed cleaned at least once a month, and it always took me 20+ minutes to scrub out the whole filter and piece everything back together.
Kensfish.com has the 2217 for $130- cheaper than the 305! Throw that on one end and any HOB you want on the other end to help move water and add some filtration, and you're golden. I'm a big fan of AC, but eventually I ended up putting an old Emperor I had lying around on my 60. Figured if I was gonna use electricity on a powerhead, I may as well use the filter instead, but it was entirely unnecessary on the 60 gal, except for helping with water movement.
Edit: Yes, the 405 I cleaned leaked. 2217+AC110 = cheaper than fx5. Then you have two filters running, and that much more peace of mind.