I've read most of the laptop advice threads and done some research so know what I'm looking for, one thing though; I need a laptop sharpish as my old one suddenly died. So my question:

Are all of the electronics chops on Tottenham Court Road a good place to go to get one, or are they just rip off places to eat tourists? If not where should I go which is centralish London that will be open tonight post work or Firday Morning?