I want to buy a laptop and since I'll be travelling a bit in the next few months, I wonder whether I can get one VAT-free (or at least refunded at a later stage).

Can someone tell me whether there're any good duty-free shops selling laptops at LHR T4?

Any other shops that have a good range of laptops in central London? I've looked at those at Tottenham Court Rd over the weekend, some nice ones there, but still slightly overpriced...

About some of the fine prints on VAT refund, from what I've read, this scheme doesn't cover mail orders. So if I order one from an Internet site, I can't get VAT back? (I haven't seen any Internet shops that offer this option except John Lewis, which I suspect you've to physically go and pick the goods up.) Any other fine prints I should be aware of?

Lastly, my budget is around £1200 - £1300 (excluding VAT). Anyone to recommend one? I've looked through here and from what I've seen, Dell, Acer, Samsung have some good ones. Fujitsu aren't too bad. The other big brands are good (if not better, but more expensive...)

Thanks.