I would just hook everything up on the wall end of the tank to get it to look really clean. I wouldn't even use the spray bars, but just the 90deg elbows. Have both elbows, just below the surface, shooting the water the length of the tank. This way, you'll create a loop current, whereby the top half of the water column flows one direction, and the lower water column flows in the opposite direction, back towards the filters' intake tubes.
I don't bother getting too fancy with filtering pads. I just use the course pad that comes with the Sunsun and fill the rest of the tray with Poly-Fil(polyester pillow stuffing). I put this tray on the very bottom of the canister. The other trays, I fill with ceramic media.