Hi everyone. I am looking into a large aquarium. I am trying to decide which way to go and I need some help. I have always had freshwater aquariums and am kicking around a salt setup. I might start out fresh and later go to salt. My question is, should I go with a tank that has built in overflows or have the tank drilled at a later date? I have never had a tank with the overflows so I am unfamiliar with those setups. Thanks for your help.