Nice tank, and as far as colors I wouldn't stick with the white. Now as far as filters and fish it really depends on what you are going to keep. I have had a FX5 on a 55 and the fish seemed to enjoy the water flow. now I had firemouth and giant danios. Now if your keeping the oscar in the 110 they like water flow from my experience. so a nice canister or 2 with a spray bar and they will love it. To go with the oscar maybe a bottom dweller like a birchir, smaller eel, or a nice size pleco. You can do 2 oscars if you keep the water parm perfect. once they start going south the oscars get mean.