Doug,

I am more of a studio guy, but I totally understand what you are talking about.. The only I get a way with buy gear is to claim TESTING to my girlfriend... Sometimes it works and sametimes the BS flag goes up..

Wingnut,

You can try it half way up and see how it goes.. I have only heard of people doing it that way and have not tested a room that way. But more is better...
I will test it and see what I come up with... I will report the graphs to you.. It may take a month or so..