If you have the money you might get an alien...BUT...and it's a mighty big BUT...
I would hold off on buying ANY new laptop or computer unless you design it yourself and install your own OS in the next year. Right now they have bug central city because all the computers are coming out with Vista...and that will SCREW someone over big time.
ON the otherhand, it does appear you can get an alien without Vista still...a good sign. Just make sure they give you the authorization codes and a restore disk if you don't already have a copy of XP yourself for that computer.
And since you are splurging on an Alien, I'd say upgrade everything to the max, and give it to yourself, and the older ones give to the kids.