The Black Gate caps will likely start to get prohibitive so if you want to try I bet sooner is better than later. Audio Note kept them in business the last several years and I know they're still trying to find something as good - but they felt BG was the best around and they tried them all. Of course best in one application may not be best in another so...

But this is the Black Gate Article in pdf. http://www.partsconnexion.com/t/blac...te_Feb2003.pdf