I wouldn't give up on the SF power 2 so fast. My original set of tubes were still good when I changed them after 5 years. The entire tube set cost $290. Not bad for 5 years.
From tubes to solid state. What do you loose...
...if your priories are transparency, timbral acuracy, micro dynamics and soundstage? I am hesitant to give-up on my Sonic Frontiers Power 2, but buying tubes every so often can be quite expensive. The current tubes offered (Sovtek, Svetlana, EH) are short-lived and not cheap either. I will probably stay with tube pre-amp and go with the ss amps, like Mark Levinson...?