Most of the laptops will run photoshop, not as fast as a desktop because they are power limited.
The issue is the screen. Almost all of the laptop screens are horrible for image editing. You will want to use a external monitor instead. Once again, power usage is a big factor. The new Apple laptops have a big advantage with the screen.
You can get CS6 for a mac, and likely sell your CS6 for windows for a net profit, or run a emulator.
Otherwise, I'd take the advice of the person who suggested waiting for a Lenovo W540 (if it ever actually happens), and separately purchasing / installing a minimum 256GB m-sata drive for programs, boot, and lightroom catalog (if you ever plan to use Lightroom). A 1 TB drive for a main drive is also a good choice if you plan to store a lot of raw images on the laptop. Crucial has a 960GB SSD for a low price.