Jessops is - in my experience - the best high street outlet. They're a good specialist high street camera store, but only as good as the staff are interested in selling.
Personally I'd rather have somewhere to take big bucks kit back to if it fails. I suspect you'll get more customer service from Jessops than any other high street outlet.
i agree thatyou oul probly get a better service from jessops than somewhere like currys, however jessops seem to employ worse staff than halfords for exmple i wanted some info on a product they had online so went into the shop and asked him aboutit and he said 'imafraid theres no such product'.. 
one thing i will add is that the market for new and used canon gear is slightly bigger than nikon.
Jessops generally actually employ keen amateur photographers, photography sudents, semi pro etc and I've always found there advice pretty good, it's not as good as some forums or pro sites, like kenrockwell, dpreview but unless you have access to a proper photography shop, say camera world, jacobs etc then you wont find better advice on the high street.
The best thing is that you can try before you buy, I was looking at lenses, so took my body to the local store asked to test is as test I did. as well as the price match, you've got 30 days no quibble returns
*So personally I'd recommend them, 90% of my gear has come from there as most of the time they are as cheap or will match the price, and for me knowing if something goes wrong it's a trip down town at lunch is very reassuring as well as the fact it's going to be genuine and not a grey import.
http://www.camerapricebuster.co.uk/ will pretty much give you the best web prices, but as said most places will price match each other
* you'll want to double check this
