I'm looking at building a new PC and one of my primary requirements is to be able to run triple monitors. I'd appreciate some advice about motherboards and cards I can use for this, in the mid / upper mid range.
I'm intending to run Ubuntu on it with Parallels Desktop so I can load multiple virtual windows machines, and I'm intending to throw a significant amount of processing power and memory at it.
I've been considering going for a Mac Pro as I've had good experiences of Parallels for Mac on that, but with the price of a suitably upgraded Mac Pro well in excess of £2000 I'm considering alternatives.
Although I've regularly built my own machines for the past few years I am not a hardware geek, so specific advice would be appreciated.
EDIT: Thanks for answers so far. I certainly want to use a motherboard with twin PCI-Express16 slots so I can maximum performance on all screens, and I was certainly thinking on a quad core and at least 4Gb memory (I can afford to go up to $2000 on this, although I'd prefer to keep it to $1700 if possible).
I also have windows licences available (as a registered Windows developer), although I run Ubuntu on one of my workstations and I'm quite comfortable with that. Are there any advantages to using either Windows or Ubuntu as the native OS ?
Any specific motherboard/graphics card/cpu recommendations?