If you can spend 1200-1600, go with the Asus G73JH. Quad core I7 processor, 1080p HD screen, ATI 5870 video card ( very very good ) 8gb of ram ( for ALL of your multitasking needs ) I have one, I love it, its fast and I can multitask like a CHAMP.
Great deal for the specs.
Being on the road so much, I decided a couple months ago to stop lugging around my desktop machine and all that goes with it, and after snooping around, the Asus G73JH is what I got too.
It's a real powerhouse and I've not run into any problems at all working with large files in CS5, a giant library of photos in Lightroom 3, autocad, etc., and yeah, it multitasks like crazy. I typically have several of those things all going at the same time, along with Excel, Access, and more, and have yet to hit the wall even once.
On the monitor, though this has a nice, big, bright monitor, I felt I needed more, so I extended my screen real estate by hooking up an external 23" widescreen LG W2353VP. Are either screens perfect or high end, competitive with the best of the best? I'm sure the're not. But they do get the job done with big, bright screens that deliver fantastic color and contrast, and I'm very happy with the setup.