I second Kryzak - not for the specific computer but for the size and use with home PC.
I have a monster desktop built only couple of months ago and a 15.4" Dell Inspiron 6400 with 2GB Ram and and intel Dual Core processor. As much as I like it, it is way too cumbersome. Given the fact that I have a desktop, I'll probably switch to a 13.3" XPS.
Why Dell? Even though I hate the company, for decent laptops, their outlet prices are hard to beat...
$710+tax for a XPS 13.3" 2GB/ Dual Core Intel / DVD RW+ / 160 GB ... Their video resolution sucks (1280x800 only) but, this computer will only be for "office/school use" anyhow...
My recommendation,
1) for those who will have only 1 computer : go for a powerful and large screen laptop (a desktop replacement in slang)
2) for those who will have a power desktop as well : go for a portable or ultra portable depending on your budget...
my 2 cents...