Joule Electra preamps and amps. What is your impression?

Never auditioned them. Thinking about replacing my SS integrated. Lamm, VAC etc. are out of reach.  Also, how would Joule preamp work with some SS amp, say, Rowland # 2 or older Pass or something like that ?
My Redgum integrated is very dynamic with excellent drive and bass so I won't sacrifice that even for a more natural and sophisticated.