Help setting up 7.1 ch. system

[skatinkamel]

Hi this is my first post ,but anyways i have the BD-350 and i am pleased with the video quality on my samsung lcd (1080p), but recently ive been investigating 7.1 channel sound systems to get high quality audio along with my video. At the moment i have a 5.1 channel system but no receive. I was wondering how to setup up a receiver to achieve Dolby trueHD and what is an affordable route to go to achieve high quality sound seeing as im 17 and dont have thousands of dollars to put into my system. i plan to spend about 600 for the reciever. Also where would you recommend i get speakers for 7.1. im kinda new to setting up audio. so thanks for any help i recieve.