Multi screen computers?

Hey,

I'm looking for a multi-monitor PC set up, ideally with 4-6 screen
capabilities. I have been digging around on the net and have found four
companies that provide what I'm looking for:

DigitalEGA (Digital EGA - Professional Multi-Screen and Computing Solutions) - They provide four base model PC's with a
wide variety of upgrades available that can power anywhere from 2-24 monitor
set-ups. They also sell monitor configurations separately and offer a number
of value combo's (PC and Monitors).

Multiple Monitors (Trading Computers & Multi Screen Arrays | Multiple Monitors) - These guys sell a decent
selection of monitors and PC's but their PC's seem a bit dated, Intel i3
processors etc.

Digital Tigers (Trading Computers: Multi-Monitor Trading Computer Workstations: PC Multiple Monitors: Digital Tigers) - Well established company with an
extensive range of monitors and PC configurations, I found them to be a
little pricey, especially as I would have to have paid a lot in shipping and
import duty.

Quad Vision (Quad Vision - Multi screen, multi monitor, digital signage, video wall solutions) - They seems more for large corporations
but do offer workstations and monitor configurations, although there site
does not seem to have e-commerce or pricing available.

Has anyone else got any other suggestions on other sites? I am in the UK so
ideally I would like free or cheap shipping