With the release of the 1720 (which, in short, has better graphics, a slightly faster CPU, a faster harddrive and is around 120g lighter), Dell is clearing out the range of 1710s. For £380, you get:
Core 2 Duo 1.8GHz
256MB 8600M GS video card (which isn't too bad for videogames)
DVDRW Dual Layer drive
17" screen, 1440*900 resolution
This system would've set you back some £600 last week. Snap it up, asap, because I reckon it's a cracking deal. You'll struggle to find a faster CPU in a laptop at this price, nevermind dedicated a 8600M GS GPU as well. There may be vouchers for this too. Buy via TopCashBack to claim back 4%, or thereabouts, of the pre-VAT price.
I own one myself, and recommend it without hesitation.