Tim, Jensen 4-pole caps are good, if expensive. Rubycon ZA and ZL work well in small filtering positions. Space-permitting it's effective and cheap to parallel Rubycons up to whatever capacitance is necessary. This can get large in battery supplies.
I put the Jensen/BAT PIOs into Cary 2A3SE monoblocks, where they improve upon the stock Audio1 coupling caps.
I put the Jensen/BAT PIOs into Cary 2A3SE monoblocks, where they improve upon the stock Audio1 coupling caps.