Its nice talking about the farming out of call centres but... not doing so adds a premium on the product (I am no way justifying whether it is right or wrong I just work for a telco the cost of farming calls out to india is little more than to a suburb of london, however remotely the labour is much cheaper).
Anyways - with the I7, there are some good deals - scan, novatech and a few others are going for around the £1100 mark at the moment in quite hi spec builds.
If I may be so bold as to suggest the best magazine to keep up to date with this and their website is
Custom PC | The essential read for PC hardware, games and modding - this is more geared towards your power users for high tier games/processing. But gives great advice on budget alternatives.
Follow their advice and you can get a i920 overclocked to over 4ghz air cooled for small money compared to buying higher clocked versions of the i7.
I am not an expert on nehalem series but have followed it since before it was released - if anyone wants an unambiguous view feel free to pm me or ask here.
Cheers