That is all the basic things you need, You can add some more plants since you are getting CO2 system. For your current setup and plants I don't think you need CO2 setup even flourish excel will do the trick. With your tank you can create wonderland, use some more substrate in background. you have very big tank use a driftwood and add some moss your aquarium will come alive in few months. very big leaf plants doesn't look try adding some more stem plants in back.