I'm UK based but visiting the US later this year. Thinking of getting a Mac Mini which will be easy enough to carry in luggage. Is the price 2.0 Ghz $799 plus tax or inclusive? What are the pitfalls of buying in the US? Issues with Power Supply 110v (US) 240v (UK) ? Is there ANY 'global' warranty or is there no warranty when I get it back to the UK? Anything else?