I bought a RP 7 new in 2019 and loved it. I concur with the positive comments written above. I rolled the tubes which is super in-expensive as you can roll two of the four and get 80% of the change with just two of the four tubes. This allows you to buy two pairs of NOS tubes and put the sound you prefer in the front position and relegate the second choice to the back, in the mix but not dominate.
The RP 7 is VERY quiet and was a great mix of SS and tube sound. It's a great way to move into the tube component world. I sold the RP 7 and bought a used ARC REF 10 dual box monster. The REF 10 is a very impressive unit, but it seems they worked to make it less tube sounding and they accomplished that. It sounded almost SS. I currently run a Modwright LS 300 line stage which I like very much. I would summarize that the RP7 has nothing to be ashamed about being compared to these more expensive preamps. The RP 7 is reliable, musical, and QUIET. They have an even rich tone, bottom to top. They are resolving, but the more expensive preamps edge it out in the area of resolution. I believe that's where the RP9 comes into play. I doubt few of us would not like the RP 7 if it was dropped into our system.