Hi there, Looking at purchasing a MacBook Air as a first time Mac buyer. It sounds as though the new release will be available in store tomorrow - is that applicable in Canada as well? My use is mainly web browsing, movie watching, some basic business programs, and online poker - I'm sure I'll be downloading some apps from the app store as well. Should I be looking at getting the i7 1.7 or should I be fine with the i5 1.3 GHz - I know if I was buying another windows machine I'd be going after the speed. Should I be looking at 8gb instead of 4gb RAM? Basically, which upgrades are worth getting - and which aren't required? I'd like to be able to use the machine without issue for ~2 years before looking at updating again. Thanks for your help!