I don't think anyone can predict with any certainty when kit with Haswell processors will start to show up in the UK. In all honesty, I'd be somewhat surprised if the ones advertised in the US would be deliverable tomorrow. Similarly, it's nigh on impossible to predict pricing.
They may be cheaper in the US - but don't forget, you'll have to pay import duties and VAT on anything you buy there. That can easily (more than) erode the price differential. Yes, it's possible to get around that if you have a sympathetic seller - but in my experience, most US vendors have scarcely heard of Europe, let alone know how to ship there - and even less how to help you with our friends in customs & excise.
Intel operate on a tick/tock policy of releases. You can confidently expect the 5th generation processor to be announced around May/June next year. As such, prices will likely decline most dramatically in the period leading up to the announcement. Between now and then, they'll likely be stable (high) for the near future to make the most out of early adopters, then decline gradually until manufacturers get to inventory dumping time ahead of the new generation.
No real comment. If I were spending that amount of money on a laptop, I doubt I'd mess about with it.
FWIW, by the way, my son tells me that Skyrim is quite graphically demanding.