A word of warning for those interested in this machine or the 15 inch version: there are issues with the keyboard resulting in double characters when typing fast [1]. I have the precision 5510 (basically an XPS 15) and have the same issue, it's driving me nuts and Dell won't (can't?) do anything about it.

Also, I'm currently on an old (1.2.0 instead of 1.2.14) bios firmware because they managed to introduce display flicker on on all but the highest brightness setting.

In short: there are real problems with quality assurance at Dell - be ready for this if you decide to buy one of their laptops.

[1] http://www.dell.com/support/Article/nl/nl/nlbsdt1/SLN297563/... - here they suggest to adjust the key repeat/delay settings as a last resort (doesn't help on my 5510)