As I've said,it's best to crunch the numbers yourself. It's easy enough to do(online quote from TireRack vs CDN online sellers vs local shops). Just convert to CDN $,allow for installation,tax etc and make sure you're comparing "apples to apples"
If you're asking if Tirerack is honest,reliable,good to do business with etc etc the answer is yes. I've bought two sets from them in the last year and was happy both times.