I agree with Ben.
We deployed Dell Laptops (M6500), with Win 7 64bit, 8 GB RAM and a Core i7 CPU @2.8 GHz. The graphics card is a Nvidia Quadro FX 2800M. We are still running WF3, 32bit. We've tested WF4 64bit on a couple of the machines and it just flies.
These machines also come with a wide screen display. So when you are working away from a docking station, you don't have to sacrafice display space.
I definitely think they are worth considering.
Thanks for all the feedback - I feel more confident in going the portable route.
Now to another level of detail. If I go dell m4600, they offer a:
AMD® FirePro® M5950 Mobility Pro Graphics with 1GB GDDR5
NVIDIA® Quadro® 2000M with 2GB GDDR3
Anyone experienced with the AMD card? I have read that this particular NVIDIA card is slower. those comments were made by gamers. Your ongoing help is appreciated.