Welcome to MTRC!
The thing you need to know about canister filters on a salt/reef tank if that they can become detritus and nitrate pits which in turn will cause issues, mainly with coral at first. With that said, you're going to need to stay on top of water changes and cleaning out the canister filters. As far as fish stocking goes, I agree with what was said above, try to refrain from impulse purchases (we all know how hard that can be,) and research any fish before adding it to the tank.
And lighting is somewhat of a personal preference and is dependant on which type of corals you intend on keeping.
Just an FYI, we have our first monthly club meeting of 2015 in Hendersonville on January 17th, check the stickies above this thread for more info. Hope to see you there.