Any pinnacle-quality SS unbalanced gear out there?

Rowland, Gamut, Pass...they're all balanced. (Why did these companies and others choose to go balanced; could it be just to facilitate longer ic runs?)
Anyhow, I'm looking for electronics in their league, but seeking to avoid exchange of my three pair of excellent single-ended ics. Suggestions??? (I know about Classé and conrad-johnson already, btw). Thanks.