I suggest you check out 10audio.com. Jerry does a really nice job of reviewing 5 Koetsu cartridges, from the Black, all the way up to the Rosewood Signature Platinium.
FYI: The output of the RSP is about 0.2 mv, as opposed to the RWS which is about 0.6 mv (They state is is 0.6 mv, but I think it is closer to 0.4 mv really, IMHO.) This means you need a really top notch phono preaamp with lots of gain to use the RSP. (Say 70 db or so.)
I have the RWS, and it is a very nice cartridge, but it is a little loose in the bass. (If your system has the capacity for really good deep bass, it is not a big problem, just something you live with. If your bass is only marginal, I doubt you could live with the RWS.) I am going to check out the Shelter 90X, to see if it is worth trading the Koetsu strengths (incredible imaging, soundstagind, and of course the Kostsu mid-range magic) for the more balanced sound of the Shelter.
Good Luck in your search!
FYI: The output of the RSP is about 0.2 mv, as opposed to the RWS which is about 0.6 mv (They state is is 0.6 mv, but I think it is closer to 0.4 mv really, IMHO.) This means you need a really top notch phono preaamp with lots of gain to use the RSP. (Say 70 db or so.)
I have the RWS, and it is a very nice cartridge, but it is a little loose in the bass. (If your system has the capacity for really good deep bass, it is not a big problem, just something you live with. If your bass is only marginal, I doubt you could live with the RWS.) I am going to check out the Shelter 90X, to see if it is worth trading the Koetsu strengths (incredible imaging, soundstagind, and of course the Kostsu mid-range magic) for the more balanced sound of the Shelter.
Good Luck in your search!