I have been asking around for names of guys to come in and optimize my system (including make recommendations for room treatment), but could not find anyone qualified and/or interested. I'd be quite interested in finding out more about Jim Smith. What are the variables he addresses in the "voicing" process?
Edorr- since Peter has already had Jim visit and help him, he can speak from direct experience. I've known Jim a pretty long time, and respect his knowledge. I will likely have him visit once I am set up again in Texas.
Here's a link to his site:
http://getbettersound.com/roomplay-concept-pricing-guarantee.html
My take on your question is that there are too many variables to advise you in the abstract. I'm sure all the three things you've listed may yield varying degrees of improvement, but, as you yourself seem to admit, they may be band-aids if the basics haven't been addressed. Aside from room, what about power?
I'm a firm believer in the judicious use of high quality power cords, isolation and decoupling devices (I use a few different Stillpoints products) and improvements in things like power supplies. But, really getting the most out of your system does take time and effort and some of the biggest improvements may have to do with placement in the room and good, quiet AC power.
One other observation: the better my system has gotten, the less I focus on 'hi-fi' attributes like soundstaging. It's just one facet of what makes for an overall musical presentation.
MadFloyd is supposed to have Jim come to visit him soon and promised to report on that as well.
I know that we all have this desire for the 'magic bullet' and it's easy to drop money on 'tweaks' or ancillaries because it is a new 'product' that you can look forward to playing with, rather than moving furniture, and taking measurements, and experimenting with new locations for speakers and gear in the room. (I reached a limit on this in my existing room, which is why i am looking forward to the next one!).
Good luck and let us know what changes you make, with what results.