You must be kidding me. You made the exact same thread in the newbie section days ago and we all told you what you needed to know.
EDIT : Oh okay, last thread was to choose your gun, now that you got an idea, you're asking for the best retailer, is that it? We told you not to buy the Sig, but seems you're extensive knowledge of airsoft told you to get a Sig. Whatever you want it's your gun.
But let me tell you something. If you buy from a US based retailer, (and if you live in Canada), you will not get your gun. Now, instead of creating new topics everytime you change your mind, please post in the last one.
Last thread : http://www.airsoftcanada.com/showthread.php?t=104640