It's a long 27M download, but well worth the wait. This says that the transaction will be encrypted when it is sent back to the retailer's site. If you're really concerned about credit card security over the internet, designate one of your credit cards for online purchases and do not use this card for anything else. Check how much shipping will cost. This may be quite expensive.
Surface is cheaper than air.
Check the tax. If you're purchasing from outside your province or state, there should be no tax. If you're purchasing within your province or state you'll pay the applicable sales tax. If you're going for a short trip to the US you could ship your stuff to your destination, and bring the stuff back over with you and claim it with your overseas purchases, duty free. Returns are difficult at best.