So, the Dell order turned up within 2 working days of placing my order, which I felt was pretty impressive until I noticed that it was placed with someone we, rather indirectly, use at work. Therefore it wasn't really a good test of the Dell ordering process. Chris also helpfully pointed out how Dell deal with products they produce themselves. As usual the bastard was right.
However, I've had a nice new toy to play with for the last few evenings!