Hi Callan.
Welcome to Simply Discus. Take a good look around as there is lots of good information which will help you get going on your first discus tank. I also run a canister filter in my tank but its an Ehiem, and i also love the simplicity with it. Ive adjusted my outlet bar so it creates turbulence on the surface and not too much current in the tank. I suggest you put alot of thought in how your going to set your tank up as far as gravel etc. it really plays a big part on how your discus grow especially if you're thinking of starting with smaller fish.
Feel free to ask questions as there are lots of good people on here that will help.
Good luck