OK - Am I missing the big "Joke" here.
Firstly - of course you're all going to know quad core machines exist.
You're computer geeks so of course you will.
Likewise if my particular profession happens to revolve around LCD TV's I'll know exactly what is what - probably a lot more so than those "general" people who know nothing.
Then specification wise of the machine you've just listed.
Do you think £699 is really all that bad for a piece of kit that will satisfy the needs of the majority, comes with a 19" LCD display and will also come with a 3yr warranty?
Sure you could build one for less - with each component probably only having a 1yr warranty.
Should one of those components fail you need to find which one, get it sent back, wait for replacement.
Anything goes wrong on the £699 machine in 3yrs the whole thing is sent back, no messing about.
I'm sure somebody will point out the big joke I've probably missed - I'm tired and busy building new PC's at the moment (quad cores as it happens).
But really, I'm failing to see it...