I spent £175 with an online retailer before Xmas buying a non pc related product.8 weeks later I have nothing to show for it - except the bill.
I'm now ultra cautious when buying online. I'm about to order an XFX 6800GS graphics card and have identified 3 potential suppliers - including More Computers. However, prior to ordering I will ring each supplier and just gauge their response to basic questions like returns policy etc. My final buying decision will be based upon this feedback and not price alone. Needless to say, if they don't answer the phone or even supply a contact number I will not order from them.
They get good reviews on the pricerunner link you provided.I have looked at more reviews on e-buyer and microdirect which put me off a bit but it may be a case of pot luck some people have no problems and others just the opposite.