Amethyst versus Nagaoka MP-150/MP-200

@three_paws I own the same Sumiko Amethyst cartridge as yours on an Opera Consonance Wax Engine TT, acquired in July 2020,  connected to different SS / tube amps and speaker pairings. 
After listening to classical and jazz LPs released ca. 1965-1985, and newer Pop/Jazz/Electronic/Contemporary Classical recordings ca. 2010-present I must say that I’m quite impressed with Sumiko’s tonal clarity and depth of sound. I have auditioned Nagaoka cartridges before with positive experiences, but for me I’m leaning towards Sumiko for the broad timbral ranges that I personally aim for in specific chamber, symphonic and electronic music genres. 
If you do decide to sell the Amethyst you can probably garner $370-$400 USD, depending on its condition.

Hope this helps!

I do not know about Amethyst but have Nagaoka 300 with a 500 stylus on a Linn Sondek with an SME3009R arm.

It sounds divine.

I have the 150 and upgraded the stylus to the 200. Great cartridge. I like a warm sounding cartridge and goes well with my modded 1200 mk5 tt.

Thanks, guys. 

scchengmus, I totally agree with your description of the Amethyst, and I've thought for a while that it's probably a great cart for classical, though I haven't really tested it with that genre, since I listen mostly to 50s-70s jazz these days.  The only thing I miss with the Amethyst is a bit is more energy from the cymbals (I'm a drummer, so that's partly why), which is why I find myself listening to the Sumiko Olympia more often than the Amethyst -- it's not nearly as clean, but it's very alive, and it still has the warmth and musicality that I really like.  I was hoping that the MP-150/MP-200 would have the same lower frequency depth and presence but a bit more happening in the upper registers, too.

@noromance , do you find the AT bright/fatiguing at all?

I am currently running a Nagaoka MP-500 on a VPI Prime Scout and am very happy with it.  I also had a MP-200 and agree that it would be a better choice than the entry level Nagas.