I ran both in a prior system incarnation, albeit the original Ren Sig IIa, not SE. My IIa only had 8416's as the line stage tube, so I couldn't roll, and there is only one 8416, so no flavors to try (the 12AU7's are used as tube buffers for the tape monitor section, IIRC), Just by experience and reputation I would seek out some Telefunken NOS to try, as they typically excel at transparency and articulation (too much so for my tastes in some other gear, but it all depends on gear and system matching).
For the PHI 200 I ran most happily with the new Gold Lion KT88 "reissues". Now, I liked them because they had a fuller harmonic presentation, but I did not feel they did so with any lack of detail. I found that the VAC supplied tubes were too shrill in my system, so I may not be the best adviser, given the direction needs you have. My system at the time needed a wee bit of warming to hit the right overall balance.
For the PHI 200 I ran most happily with the new Gold Lion KT88 "reissues". Now, I liked them because they had a fuller harmonic presentation, but I did not feel they did so with any lack of detail. I found that the VAC supplied tubes were too shrill in my system, so I may not be the best adviser, given the direction needs you have. My system at the time needed a wee bit of warming to hit the right overall balance.