I agree with chych, mcbiff. Your rig is definitely worthy of balanced power. Your "lowly rig" isn't any more "lowly" than mine!
The improvements the BP-3 brought to my rig are very
significant, and something I still marvel at. morphsci also seems to be enjoying his new custom BPT unit.
Check out http://www.head-fi.com,
and click on the news item regarding Alpha-Core's new balanced power unit. I have no idea how it sounds, but it also looks like a nice component. Of course, if you're not in the U.S., make sure to contact these balanced power manufacturers to let them know about your power requirements / specs in your country.