It sounds heavy, and expansive!! I think hardcore gamers need quad core much more than photographers do.
IMO, the best ThinkPads ever made would still be those T60p's with the legendary Flexview (IPS) display, which was discontinued by lenovo in 2006.
For those who don't know it:
IPS screen (left) compared to TN screen (right). Most laptops use TN screens nowadays because they are cheap. High end desktop monitors use S-PVA, IPS, S-IPS panels etc..
T60p's come with the ATI FireGL V5200 as graphic card (basically an X1600 in old MBPs), and the fastest processor a T60 can take is the Intel T7600 @2.33Ghz, which is more than enough for usual photographic applications.
Sorry grahamnp for making this thread a little OT. The W700 is surely a powerful machine, but I'll never forgive lenovo for ruining the best parts of a ThinkPad: first the display and now the keyboard
I've used nothing but ThinkPads in my life but my next laptop will likely to be an Alienware or a MBP.