Best place to buy components (UK)

Solution
UK
Amazon
Microdirect
Aria PC
Overclockers UK
Misco Tigerdirect for the UK and most EU countries.
Pixmania Just a gadget store but they have some good memory at good prices, and other stuff.
ebuyer
Dabs
Scan
Novatech
Component Warehouse <--- Sells inexpensive pre built rigs
UK
Amazon
Microdirect
Aria PC
Overclockers UK
Misco Tigerdirect for the UK and most EU countries.
Pixmania Just a gadget store but they have some good memory at good prices, and other stuff.
ebuyer
Dabs
Scan
Novatech
Component Warehouse <--- Sells inexpensive pre built rigs
 
Solution

anti-duck

Honorable
If I'm building a complete rig, I usually just whack the parts into pcpartpicker, skinflint or idealo and just buy from wherever is cheapest, for individual parts, I usually use Scan.

Other good sites are Kikatek and another really good one is CCL.