Lenovo W510 or Dell XPS 15

Ok guys, I need some help. I started looking for a laptop to do photo editing while on the road. I've spent some time reading on here about the poor displays on laptops for photo editing, but I will be traveling for some time and taking a desktop isn't possible. The first computer I seriously thought about buying was the Dell XPS 15. I've since decided that I should buy the Lenova w510. Would anyone care to tell me if I'm making the right or wrong decision?

Oh, and I don't want a Mac and the top of the line HP with the IPS screen is out of my budget.

This is how I will have it configured.

Processor Intel Core i7-820QM Processor (8M Cache, 1.73 GHz)

Operating system Genuine Windows 7 Professional 64

Operating system language Genuine Windows 7 Professional 64 US English

Windows XP Mode Microsoft Windows 7 XP Mode - English

Display Panel 15.6" FHD Display (95% Gamut, 270nit) with LED Backlight

System Graphics NVIDIA Quadro FX 880M Graphics with 1GB DDR3 memory

Color Sensor Color Sensor

Total memory 8 GB PC3-10600 DDR3 SDRAM 1333MHz SODIMM Memory (2 DIMM)

Thanks for any input!
--
Dan

http://www.pbase.com/dhesling