For photo editing one of your primary concerns is going to be screen quality (along with pairing your hardware to meet your software requirements). I don't have a good suggestion in that price range off-hand, but when you find laptops you like I would highly recommend checking them against this website, as they dedicate an entire section of each review to screen quality taking into account for contrast, sRGB color space, and Adobe RGB etc:
http
/www.notebookcheck.net/