I find listening to rock vs jazz, instrumentals or classical are totally different. With Rock I am listening to guitars, drums, and maybe a piano. I am listening to the overall beat and vibe. Rock and roll recordings are meant for dynamic speakers. I don't think you are going to be in a room and picturing where the lead guitar is vs the bass guitar. That is why I would go SS and Texton or ATC if that is all your are listening too.
The Op has great amps probably from Gestalt Audio if I were to guess. I have Horn speakers that are 98DB. I truly love horn speakers for my Jazz, Classical, and instrumental listening. Rock and roll do not engage me in serious listening. I think it is all about the musical instruments and being able to hear each instrument. Rock and roll is dynamic and in your face. I would not even use a tube Preamp for just rock and roll. I am not saying that my speakers do not play rock and roll good either. I am saying that a dynamic speaker is what I would get if all I was interested in was Rcok.
I am curious what the op is going to do.