Best Laptop/Screen Suited for Photoshop & Color

Laptop displays are usually not suited for color critical work, except a few very expensive models. The alternative is simply not to expect too much, and get a good external display later.

With a few exceptions laptop displays use TN panel technology (just like inexpensive office/gaming monitors). The most obvious problem with this (among many others) is that the viewing angle is extremely restricted - to the point where, if you look at it straight on, the top third of the screen is too dark and the bottom third is washed out. It's hard to make good decisions when the whole image changes if you shift a little in your chair. As a minimum you should look for one with an IPS display, which doesn't have these problems. But even so, laptops can be difficult to calibrate and profile properly, for a number of reasons.

I haven't used laptops for some time, for precisely this reason. Otherwise they're quite handy and usually plenty fast enough.

Actually I think a Macbook Pro is your best bet. The specs don't say, but I seem to remember they have IPS displays now (correct me if I'm wrong someone).