I personally would not purchase a notebook that did not have a true life/glossy screen. True life gives much richer and vibrant over the old mat ones, and looks so much better. Those pictures and video or not really representative of the screen in use.
All my Dells have true life screens, two with WXGA+ 1440x900,
Notching the screen speck by one is imperative in my view with a laptop of this calibre, wife had the XPS 1530 with the 1440x900 until this weekend, now thats replaced with a Samsung NC10 (and still got £320 left over from the sale).
I am reading this on my 17 WUXGA 1920x1200 TrueLife XPS M1730.
£30 well spent if you go for the 1440x900 screen. Pricy for the 1920x1200 one.