Hey guys, I've been pricing around recently for an iMac 27" and Macbook Air 11" and found that they are both substantially cheaper from the US Apple Store. For example, there's a refurb MBA 11" for $849 (£534) in the US Store, whereas the exact same laptop is £719 in the UK Store. With regards to the iMac, the refurb is £1,119 in the UK Store and it's $1,419 (£893) in the US Store. Firstly, why on earth are the prices so substantially different? Secondly, if I did buy either of the products when I visit America this summer (will probably be the MBA due to transport difficulties with the iMac), would I experience any difficulties with the functionality in the UK? Sorry if this seems like a noob question.