David,
The Woo Audio 300b amplifiers have been well regarded for quite some for both sound quality and built quality. Mundorfs are very well regarded. I have to believe that those higher quality coupling capacitors and power supply capacitors would make a worthwhile sonic improvement. I can't speak precisely to how reasonable the upgrade cost is but probably good when considering the parts involved and the professional labor.
Charles
The Woo Audio 300b amplifiers have been well regarded for quite some for both sound quality and built quality. Mundorfs are very well regarded. I have to believe that those higher quality coupling capacitors and power supply capacitors would make a worthwhile sonic improvement. I can't speak precisely to how reasonable the upgrade cost is but probably good when considering the parts involved and the professional labor.
Charles