That sounds really impressive. Congratulations!
I have mixed feelings when it comes to Dell. I use Dell U2713HM. Initially I got the first revision which had issues with a buzzing sound emitted when displaying a pattern on the screen. It completely died after a few weeks. I got a replacement (third revision) and haven't experienced any problems since.
I haven't owned a Dell laptop. How good are they when compared to other PC laptops and MacBooks?