So, I'm about to buy my Dell M90 at last. My last question relates to durability. Does anyone have experience of using a laptop as their main machine i.e. all day, every day? Do you leave it on all the time, exepting when it is necessary to take it out of the office? Any views on reliability compared to a tower type? When in the office I plan to use it's docking station and external keyboard, mouse, 3D navigator and monitor. All feedback appreciated. Flynt