I got my camcorder from
www.ajelectronics.co.uk and was very impressed with the speed of the service (it came next day) so would have no hesitation in using them again.
I seem to recall other threads in the past with a similar question, and don't recall ever seeing a negative comment about AJ Elec.
PRC Direct are usually fairly cheap, but I'm not sure if they sell UK camcorders or grey imports. It might be worth checking first as I don't know how you'd get on (warranty wise) if you ever got a problem with a non UK model.
I've shopped directly with both PRC and RGB (they both got shops in Ilford) and have found them to be friendly and efficient, but really can't answer for their internet shops.
It's definitely worth trying Jessops price matching - I did it with my digital camera and they matched to within about £20, which I was prepared to pay for the convenience.