Hey Sunny,
Seth is right, Bose speakers are major no-no here, but I guess I can give few ideas...
Imho he seats way too close to his (nice) TV, but given his small room ( I assume) first of all I'd hang this flat panel on the wall.
Before trying to match THX video recommendations, I'd make sure my audio setup meets Dolby 5.1 recommendations (IE - reposition the speakers)
Also get cheap radioshack SPL meter (try ebay for even cheaper) and make sure you set all speakers to small (sub is must have in eyes of THX) and speakers to 75 Db...