I am no dell fan. But when it comes to high end laptops, the Dell XPS Laptop is the best. Hands down.
http://www1.us.dell.com/content/prod...=19&l=en&s=dhs
Close second is the Alienware laptop (I'n not an alienware fan either..)
http://alienware.com/product_detail_...de=SKU-DEFAULT
Both within your budget.
Edit: Fully loaded and light are rather contradictory.