In my experience, Soix is dead-on regarding speaker placement. It took me about two weeks of fiddeling (20 min per day after work) to get my set-up where I was satisfied. One problem, and it just might be me, after about 15 minutes of listening I seemed to loose my objectivity. I had to keep notes to insure I was making progress. After that, I begged, borrowed and finally bought new cables. They did make a noticable difference but I do not think I would have recognised their added value, without first being sure they were the only change.
