<font color='#000000'>I was considering purchasing one of those set-up dvd's to help calibrate my home theater system. Are those things worth the money? If so, which one's are the best. I seem find a lot of info on the Avia - Guide to home theater. Has anyone out there tried it? If so, would you recommend it? It appears to have some tutorials, which I think could be good for a beginner like myself.</font>