The issue here comes down to how much one is sensitive to tube rush. What Xagwell is trying to describe to us sounds like the normal tube rush associated with the Rhea. Since the gain stages are all tube, it is normal to expect some extra tube rush as the gain is increased. Whether or not this is the "ideal" way to apply gain (vs. JFETs) is not really the issue here. There is no question that the Rhea performs extremely well.
Anyone auditioning the Rhea, or any other tube phonostage, is going to have to answer the quesion, how much tube rush does it take to bother you? I came from stages like the EAR 834P which had far more noticeable tube rush than the Rhea. I have used a .25mV denon with the Rhea at a gain setting of about 62dB and still I have to get very close to my speakers to hear any tube rush and it is certainly not audible when the stylus drops. I have swapped out the stock tubes.
Maybe this is semantics, but I don't think of tube rush as noise. If you're hearing more than what I have described then I would tend to think that you are either more sensitive to rush or there is perhaps something amiss with the unit you're listening to.
