Some of the replies in this thread are a bit harsh, he's not asking where to buy it but what machines people recommend (which most of the threads in the hardware forums are about).
Unfortunately I have no idea on laptops in the specification you want so can't help, although I guess you'll want it for around £600 if it's US dollars? How about a Dell, they are usually pretty cheap and well built?
Why buy a premium gaming laptop for office use? And it's way beyond $1200, the cheapest XPS M1730 on the Dell site is $2000 (assuming that's US dollars, you didn't say). No offense but I agree with Beermonster, you need to do some basic research yourself rather than expecting other people to do it for you, and you need to visit some shops to see them in person and play with them - i.e. see what the screen viewing angles are like, what the keboard feels like, what the track pad feels like, see how heavy they feel etc. If you don't you face a good chance of getting something disapointing or plain unsuitable.btw I think XPS 1730 of Dell is quite good in this category.
what you say?