well im my experience i've only delt with whisper and AQ power filters (the fluval being my first canister). I must say the whispers have never given me issues at all, usually cheap media and move decent amounts of water. The only issue i've had with a whisper was the pump stopped for a bit (got clogged and the exact same thing happened to my aq30 as well) but some good cleaning both work just like new.
what i meant in my first post was that if you had a whisper and were thinking of replacing (was preassuming you had bought a kit my bad assumption). whats your price range if i can ask and if you have a petsmart local the stores will price match their website (usually a bit cheaper on most everything)