Don't mess with success. If you get a chance to put some other top line pre-amps in your system for a few days, do, but only for information. If something blows you away, then buy it, but otherwise just stay informed.
SS vs. tubes makes no sense to me. In their top incarnations either is excellent.
A great SS pre-amp to try is the Jeff Rowland Research Group Capri. Look at Guidocorona's reviews and comments here on A'gon. It unseated his ARC Ref3 and another replaced a Conrad Johnson Premier. In my house, the Continuum integrated unseated my Conrad Johnson CA200. So, you see, despite it's low cost ($2700 without phono-stage and $3055 with) it's in the top echelon.
Dave