At work, after just over 3 years of using an Inspiron 8500 laptop I have replaced it with a Latitude D620. Complete with a bluetooth keyboard, mouse, docking station and 19" flat screen monitor it is a huge improvement.
So far the only fault I can find with the system is that if the laptop screen is raised when connected to the docking station the monitor loses the picture and I haven't found a reliable method of getting the picture back to the monitor without rebooting the PC.
One minor irritation with the laptop setup was that it came with Google Desktop Search and Google Toolbar pre-installed. I really dislike non-essential software being pre-installed. Suffice to say the Google Desktop Search was immediately uninstalled. I did leave the Google Toolbar installed as I do find it useful (if only for the spell checker).