Canister Filter or??

[Koresample]

I have a canister filter (Fluval 205) in addition to a seaclone 100 (i know now), plus a powerhead. total GPH is about 750 after head loss. My tank is 41 gallons and i have 49 lbs live rock and 60 lbs sand. Once things get established do i need the fluval or can i just run powerheads and wavemakers? I don't have the room for a sump in my stand and having it sit in my living room is not an option. Suggestions? If i keep the Fluval, what suggestions for media (knowing i need to do regular water changes/media cleaning each month)?