Linux on a laptop has never worked out well for me every time I tried. Getting an external project to work usually has issues, wireless is sometimes flakey and battery life typically sucks. I highly recommend checking out OS X on a laptop. I always found the Mac desktops to be too expensive for what I need (since I already have a laptop I don't need heavy multimedia just an always-on workhorse).
> Linux on a laptop has never worked out well for me ...
Then you need to try out an IBM/Lenovo T60. :) This is what I've got (bought it cheap second hand, it was a great buy) and it's rock solid running Debian Lenny, everything works, and works well. ThinkPads in general are great for Linux compatibility.
But thanks, I will definitely take your words under advisement when upgrade time comes around.