I have this eaxct macine and can confirm its really rather good. Only minor annoyance is that there isn't an option for a matte screen, but otherwise its a beast.
Also, regarding an experience with Dell, I smashed the screen on mine, and Dell offer a "fix it at your office service". It took a few days to get the repair man to me which I'm happy to put down to it being Christmas, and the new screen only cost me £70 which I feel was a bargain. So another piece of anecdata to suggest Dell might be okay now