I think all my competition should use Windows.
If you run Adobe stuff you my want to get a G4 Powerbook since Adobe is saying it will not be until late this year that their stuff is ported over.
http://www.apple.com/powerbook/
I have the older version of the 17" and love it. When I'm home I plugin a mouse, keyboard, and a 23" display for a two monitor setup plus a couple of FireWire drives for plenty of storage.
Close the lid and it goes to sleep. Open the lid and you are ready to pickup where you left off within a few seconds. I never shut down my computer and it has been over a month since my last restart since the only time I restart is if Apple releases an update that requires it.
I have spent zero time in the last year doing any kind of maintenance and it has been years since I've had a crash that took my system down.
Mac multitask really well and I just leave everything open and switch around.