kirby.. in oshawa.. i just picked up the new crichton's from there with px12 bindings.. pretty sweet.. they also have line, aramada, salomon, dynastar, k2 and more..
corbettes has an incredibly massive store, always helpfull staff at the ski and snowboard show every year also. Kirby is pretty good but its fairly pricey, chill staff though.
Dude, I just read in another thread that you ski at Blue. There is a shop at the bottom of the central chair (silver bullet 6 man chair) called badlands sports. They have the ar5's you want. If you get your park pass, you get a discount there too. Just a heads up.
If by testing them you mean touch them, then yeah... but they aren't gonna let you ride them. If you are unsure about them, then just do some research on this site. But you know they are a solid ski, just make sure it is what will be best for you.
corbetts is easy to get to by go. its a five minutes walk from oakville go station. and it has twice the selection of any of those other shit stores. any one who tells you otherwise is fucked. and theyre far less expensive. its the biggest ski store in north america