Koetsu RoseWood Standard upgrade?

I would definitely try the something like the 1131 if you can.
I ran a Jade in to my Monbrison, and didn't feel synergy was good. It had enough gain, but was anemic sounding. Looks like you have a nice system going there, enjoy!

Are you using Koetsu with VPI table/arm?
I tried a few Koetsus with my VPI Classic including
Rosewood and never felt them to be an ideal match.
Koetsu really needs high mass arm like FR
to really show them at their best, I believe.

I am using a Koetsu Azule Platinum on my JMW 12.7 arm and it sounds great with damping fluid. Without the fluid it is lacking in bass response.

I have the Koetsu Platinum Tigereye mounted on a VPI 12.7i arm. The synergy between cartridge & arm is excellent.

Dear Bogeybuster49: Yes, the Rosewood Signature Platinum is way better and with lower output too. I don't see any real trouble with the Rosewood in the VPI tonearm, I respect other opinions on SUTs but for me an active high gain phonolinepreamp is the best choice for the RSP or other LOMC cartridges. Yes an external SUT can works but then ( other than the SUT ) the very sensitive cartridge signal has to pass for additional stages: IC cables and connectors that degrade that precious cartridge signal. In the other side and talking on that kind of high quality performance level we have to think that the stand alone phono stage must be a real first rate design.

One of the gentlemans here posted that your Monbrison " is not a good synergy with " but this is a problem of Shindo design and in any way means that other SUT can beats a top well designed active high gain phonolinepreamp. IMHO if other audiophiles think that is the other way around and the SUT is better their way of thinking is telling us that they own or owned the wrong or not very well designed active high gain phonolinepreamp.

Of course and as always it's only an opinion.

Regards and enjoy the music,
R.