All 5 model of Dell computers you list are Intel based with an ATI (ooops, AMD) graphics card.

If you ask directly to Dell for AMD configurations, they will sell you a machine with it!! ;) Belive me... ;)

I've used a number of different workstation level graphics cards before. ATI has always been the one that came through when others failed. This means my next orders will be from Dell. I like Dell too, far fewer surprizes from them when I order. I hate surprizes when I order workstations.

its thie graphics cards there using not thier CPU's.
When AMD can get their top range CPU's into those workstations then that will be a real coup. that has to wait for the new arch coming Q1 2011

dell playing one off against the other?
is intel's bribe not cutting the mustard or has the legal process done a good job?