Can consider these:
14"
Lenovo Z400 touch, i5-3230M + Nvidia GT740M + (1366x768, touch)@RM2199, 4GB, 1TB, W8; 2 years warranty

15.6"
Lenovo Z510, i5-4200M + Nvidia GT740M@RM2399[2.2kg], 4GB, 1TB, backlit, W8; 2 yrs, color: white

*Prices in RRP, negotiable
*Use remaining budget to extend warranty to 3 years for peace of mind. Since usually a notebook lasts long or not depends on user care and a little bit of luck.
*Recommended these because they are running on Mobile processors (not power saving ones), so you get more CPU performance at the expense of battery life. But do take note that the Z4xx/Z5xx series are a tad harder to upgrade or do maintenance. So its best to upgrade everything when you first buy it. Upgrade to at least 8GB RAM, it will help a lot with Photoshop
*Upgrade to an SSD later on when you have the budget, that will help reduce load times significantly too