Re: I've said it before...
"You can't do CAD on a laptop, only a workstation will do. Horses for courses."
What? Of course you can. I've done it, and to do "real work." You may not enjoy it, but you can do it. If you're doing 3D, it may be much more of a challenge, but you can certainly spec out a 15"-17" laptop today with 32GB RAM. I would suggest at least adding a USB trackball for input, very few laptops have decent trackpads and IBM's Trackpoint have all but disappeared (is Lenovo still pushing out laptops with the nubbin?) which was only marginally better than a trackpad anyway.