I looked at three CanTire stores in BC, was not impressed, prices were seemingly higher than they should be, and the airguns were mediocre IMO.
At Walmart, they had two really decent airguns: a Winchester .177 with beautiful wood and a 4x scope for just $120, and a Crossman Phantom .22 pellet 495fps, for just $99. I bought the Phantom, a scope to go with it. Its tough, handles nicely, good trigger, built to last a long time (except all these new air rifles use plastic "iron sights" that will break quick). It's a tackdriver, and I've been stocking up on hunting conicals for it since then! Same store has 500 hollow pellets for $12, and 175 pointy hunters for $5.50, so about 3 cents per shot!
Whatever scope you get, MAKE SURE it was made for airguns...the spring vibration will kill a firearm scope, because the forces are opposite direction. I got a $40 Walther brand scope, looks to be exactly the same as a Beeman scope from Walmart and other places. Very clear, happy with it, and it's nice to have the Walther logo on it even if its just their name on a Chinese scope (like the Beeman).
IMO you wont do as well at CanTire, and to do better than me, go check the true airgun enthusiasts.
I second the .22 Phantom. Check out my squirrel problem thread to see how it performs. It's a good buy and I paid $109 at Walmart 2 years ago.