HT / Audio system Recommendations under 15K.

I am looking to install a HT/Audio system for a second room about 14 by 16ft.
My main system consists of a lex/linn set up.

Currently looking at the Linn DVD classic/Linn Komponent speakers, the Meridian 3100 speaker / DVD player, NHT dx system, Revel gems,

I am looking for a system for both movie and audio use with a realatively clean look and easily upgradable or interchangable for the future.

I am open for used/demo models in my search as well as going with a 2/3 speaker set to start and add the rest later.

Any recommendations will be appreciated.