I use a Dell XPSM1530. Dell's build quality has been, well, variable to say the least of late but the XPSM1530 although now discontinued is an awesome laptop. The best part though is the 16" 1920x1200 display. I do a lot of proposal and report writing and it allows me to have two documents side by side.

It's also good for coding, gives me plenty of space in PyDev, Immunity Debugger, plenty of terminals and everything else I need on the one screen and it's still portable too!