The Zonatus is awesome as is the Trimac. I would love to find either up here. My experiences with Carpentis have been frustrating, pure evil and waspish (my wife hated them because ours were such s#&%heads haha). The pool filter sand is great. Much cleaner than play sand and way easier to wash. As for sump vs canister it's whatever you're comfortable with. I personally don't like swapping and cleaning socks all the time. Seems funny I am talking to someone on the other side of the planet about the same silly fish I keep. Cheers, time for a Merlot.