I moved to a new house a year ago and I'm restarting my fish tanks. I have a 50 or 55 gallon "tall" tank with all the gear I need but I wanna switch my filter from a fluval system that looks like a canister that sits inside ur tank. Kinda an eye sore. I heard good stuff about Rena xp systems. I see a few xp3s used on sale but there's something about a used system that's unsettling. I know the xp2 is rated up too a 75 but the xp3 also comes with a flow ctrl. So a used xp3 or a new xp2? Don't wanna spend lots as this is an $$$ hobby and I got a few tanks to set up. Cheapest place to get a xp2?