Yes, buy enterprise-class hardware (Latitude, etc.) instead of the consumer brands (Inspiron, etc.)
Dell also has a program for large enough IT departments where they'll use a buyer-provided disk image at the factory so machines can be deployed right out of the box.
Not Dell, but the retail store where you got it. Most (Wal-Mart, OfficeMax/Depot, Best Buy) have their "Service plans" which is pretty much paying to get rid of misc software. Retailers gotta love that extra profit while the employees get a nice SPIF.
When it comes to McAffee and Symantec I don't trust a regular uninstall. Until I do a clean install of the OS the machine is forever unclean (any fans of "The League" out there?)