I drilled a hole in the wall directly behind where the posts are on the back of the QS8's and fished the wire up through the ceiling. Makes for a super clean look (before that I had run the wire up the wall into a hole in the ceiling).
However the bit about pulling the lip on the T-brackets out just a tad really is good advice. I didn't do this the first time around and after hanging on the wall just fine for months, I came home one day to find my QS8 laying on the floor, and a bare wire hanging ominously out of the wall where it once hung. There was also a rather roughed up printer sitting right underneath where the speaker had been hanging.
Axiom QS8 - 1
Epson Stylus Photo 925 - nothing