i find that tire rack is cheaper than most canadian sites... youyou might be right that its not the cheapest around cos there are other US sites that are cheaper but if you compare tirerack with the canadian sites, nothing beats it. the only bad thing bout tire rack is that there's no way they will under value what you bought so you'd have to pay full duty on them... if you go for a smaller company, they might be able to do what youyou did and under value the item so you pay less tax.
Current: 2013 F10 M5 & 2013 GLK350
997.1 GT3RS (gone)
2009 WRX STI (gone)
e92 M3 (gone)