I am planning to buy a new Dell laptop. In making this choice, I am finding myself facing the following dilemma:

The new Latitude D830 has the latest wireless card Core 2 Duo - Intel 4965AGN, and no graphics card. Instead it features Mobile Intel® GMA X3100.

The older Latitude D820 lacks the "N" feature (it has Intel PRO/Wireless 3945 802.11a/g Mini Card (54Mbps) Core 2 Duo ) and a graphics card
512 MB NVIDIA® Quadro NVS 120M.

Am I right in thinking the D830 has better wireless and poorer graphics, and how do we make a choice here? Is either the wireless or the graphics card significantly better? I am not into games, but I will be watching DVDs.

for the graphics, yes; as for the wireless, all the d820 lacks is the N (new norm, not sure if its out yet).

Will you be doing any graphic modeling? (Blender comes into mind) For the DVDs, both are enough in my opinion.

Well,I'd suggest you look at your needs (graphic/networking); you take a look at the linux drivers for the 4965AGN (or how it works with ndiswrapper), I'd also suggest you think through if you really need the N feature on the wireless/a good graphic card.

As I always end posts that answer to a question wanting my opinion : its your choice, do a bit of research about both the cards (graphic and wireless) and choose.