When you have your first child, people seem to come out of the woodwork with all kinds of advice. There are endless unsolicited tips on diapering, feeding and sleep schedules. Well, to many, a home theater is like a baby, and with its birth comes a lot of opinion. Everyone and their installer has ideas, tweaks, products and plenty of other info. After all, there are endless audio and video products, as well as spaces, setups and resources. We asked 10 do-it-yourselfers to throw out the best advice for your growing baby. Here's what they had to share.