Hrm. I find it a little busy for monochrome, lacking color to separate the various bits it ends up looking kind of jumbled. If it were me (and I am no serious student of photography, and you already pretty well know where my tastes vary from yours, heh) what I would do is crop it down to tighten the focus on the mirror ball, and bump up the contrast a little to make things pop a little more.

...I've added my suggested crop on the Flickr image, in case you have a burning desire to see it! ;)