Hey did you see that thread about the guy putting M80's in a cabinet? Alan posted a link to 'in-cabinet' M80's. These might work very well with your false wall. Take a look at them and then perhaps email Alan or JC and see what they say. I think they would look fantastic, and your son wouldn't be able to get into them! \:\)

My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD