I've recently changed a Fluval 205 for an Eheim 2213 and love it. The water is much clearer and the canister seems to require less cleaning. Oh, and it's quieter!
My 2213 is in a 200l (3'3") community tank with plenty of plants and I think it's just about right. The spraybar gives out enough flow without battering the fish around. I would, however, go for a larger filter if I had a larger tank as I doubt I'd be happy with the 2213 in anything larger.
Make sure you get the quick connect valves when you buy teh filter, these will make cleaning/priming far easier after the initial set-up :thumb: