PC World!!!!!
Only thing i've bought from there was my mouse an keyboard, cos they had a deal on, and were selling it cheaper than anywhere else
Novatechs good, if you live near one. And they're always trying to be competetive with their pricing
We used to have a PC World near me, but it closed ages ago. Now all there is around is a Misco, where you can buy Krappy Kingston 2x2GB of 800 RAM for the great (?!) price of £75 compared to £35 online for 800 Corsair. Oh joy.