I am no audiophile, but I have been doing a lot of reasearch to get into a quality system that sounds good in my room. Instead of getting in-wall speakers, I feel that my money is better spent on building a niche in my wall and placing a bookshelf speaker inside the niche and then just making some sort of framed grill covering over the hole in the wall. My question is: The niche will be about HxWxD 13x9x??. How deep should it be? If I get a rear ported speaker, will the sound get boomy because it is in the enclosed niche? Should I instead look for front ported or no port (do they exist) speakers? Thanks for your help.