Well you will find that there are many different theories on filtration methods in a reef. Obviously the most ideal is the one which is most natural, that being live Rock and Live Sand. However, this can take time to establish. Many people proudly run their systems with no filtrations, just powerheads, sump and LR+LS.
My advice would be to start with a cannister. That way it gives time for your tank to biologically mature and then maybe in 9 months-1 year you can look to doing without it? It also means you have somewhere to house activated carbon, phosphate sponges etc if the need calls. A Sump is always a great idea, even a refuge, to farm macro-algae etc and is great for keeping Nitrates down. A skimmer is also good for removing organic material.
LR+LS is the key in my opinion. If you can get a 5" DSB that will be a fantastic filtration system, along with lots of LR.
All the best,
Tim.
