Dell's new i7's

Looking into getting the Studio 15, the Studio 17 or the STudio XPS 16.

I'm seeking advice on which one to get - my priorities follow


- Battery life and overheating. I can't find any information on whether there is overheating with these or what the expected life with the 9 cell is

- I'm typically a road warrior, but will use this primarily around the house for media, games, and some graphic programming. Game requiring the highest GPU would be flight simulator.

- shipping - preliminary dates look to be near 10/25. Any idea on how realistic those dates are

- budget is not the primary concern

- being that the i7's look to be a huge step ahead, I believe that this purchase is the right one and that I'll get much more life by going with the i7, rather than a core 2. Agree?

THanks for the help and consideration.