Update April 25, 17:20
An interesting comparison can be made between Apple's latest offering and the nearest equivalent from Dell, which, by our reckoning (and by a little customisation of the options) is this one.
You'll need to do some further customisation yourself (all our changes weren't stored) - for processor speed (increase to 2.16GHz), graphics card RAM (reduce to 256MB), DVD burner (choose that instead of a CD-RW/DVD-ROM combi), Bluetooth (add); and accidental-damage cover (remove).
Do that, and you'll arrive at a price of £2,642.58 including VAT and shipping (shipping is free from the Apple Store). That's over £600 more than the Apple!
The main significant differences you'll see remaining are:
* Hard disk size - the largest Dell offers is 100MB vs Apple's 120GB as standard
* Hard disk speed - Dell does offer 7,200rpm, though you should select 5,400rpm for close pricing parity
* Graphics card - the Dell has an NVIDIA Quadro FX 2500M, rather than an ATI Mobility Radeon X1600.
* Apple RAM comes as one stick, rather than two as with the Dell, and you could save £70 with Apple if you opted for two.
* Dell's warranty is three-years' international on-site (next business day), whereas Apple's is one year return-to-retailer - something equivalent to Dell's offering costs £279.
So, if the warranty is taken into consideration, too, the headline difference in price is still over £300 (though that, of course, takes no account of the difference in cost of the two brands of graphics card or the slightly larger Apple HDD).