I also get most of my stuff from Dabs or Overclockers.co.uk...
I've had a great deal of success with the Dabs Value range, especially with their Graphics cards, Media and Network Cards. I've used a large number of the super-cheap network cards with no problems. I've also used A Ge-Force 2ti, a Radeon 9000 Pro and my current card, a GeForce 4 ti-4200.
I have issues with UT2K3 with my current card but I think it's a driver issue since everything else works.
Other than that, the cards have all been very good and I've had no complaints from the people who are currently using them.