Help choosing multi-screens

I've been 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 kinda what I'm looking for:

DigitalEGA (www.digitalega.com) - They provide four base model PC's with a
wide variety of upgrades available that can power anywhere from 2-14 monitor
set-ups. They also sell monitor configurations separately and offer a number
of value combo's (PC and Monitors).

Multiple Monitors (www.multiplemonitors.co.uk) - 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 (www.digitaltigers.com) - 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 (www.quadvision.co.uk) - 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/ things to consider??
I am in the UK so
ideally I would like free or cheap shipping