Dell :: Vostro 3700 Weight And Proc

I know there are a couple of 3x00 Vostro threads, but some are very long and the other did not seem to have an answer for this question.

First, I am very interested in this new Vostro. It seems a good configuration and design for the price. I especially love the 17" screen at < 6 lbs. Seems too good to be true.

Does anyone have experience with this machine? Is the weight including the battery and everything? It is a pound lighter than the 16" Sony F I am using. I like the F, but this Vostro seems a little more in line for me (PhD, heavy stats and datasets). My wife woul appropriate the Sony if I were to pull the trigger on the Dell.

Also, the i5-520m to i7-???qm (dual to quad, differing clocks and all). I am thinking the i5 may be the way to go. Most of my stuff is not designed for 4-cores, 8 threads, etc.