Top phono cartrige to match jfrech's system ...

ZYX is a possibilty with respect to a different cartridge, but if you are having the "trouble" you indicate, I'm not sure I'd look in the direction of the Helikon as the culprit.

I'm not offering a strong opinion here, mostly just a thought for others to chime in on...
The dealer who sold me my Shelter 501 told me that he had been using a Helikon as his reference cartridge, and that he was so impressed with the 501 that he bought himself a Shelter 901 to replace the Helikon, and was very glad he did. (Granted all this was with a Nottingham table.)
Since then Shelter has introduced the 90X, which I've never heard, but seems to be getting some great commentary here and on AA, and is closer in price to the others under consideration. Perhaps someone more experienced with the 901 & 90X(e.g TWL - Tom, are you out there?) could comment on if these cartriges might fit the bill for Jfrech.

The 'Gonner to whom I sold my OL Illustrious is using it with a 90X and I will try again to have him post his impressions here.

Personally, I feel the Shelter 501(0.4mv) is in every way as good as a Helikon, but has some differences in sonic character, and sounds more like the Koetsu sound than the Lyra sound. I feel the Shelter 901(0.5mv) is definitely ahead of the Helikon, but the 901 has less of the Koetsu "magic" than the 501. The 901 is a more "straight ahead" type of cartridge, but it has lifelike detail, and great bass response. I don't know about the 90-X(0.6mv), except what I have heard said by others, which was that there was a small improvment over the 901, but enough to be significant. I also agree with David(4yanx) that the ZYX R-100 Fuji or R-1000 Airy are superb cartridges that are equal or possibly better in certain areas than the Shelter 901.

I have not heard the Titan, so I cannot comment on that.

I think that the Koetsu Rosewood Platinum is a very fine cartridge, but it has a very low output, and you'll have to use your transformers for that cartridge. From what I've heard, the Koetsu cartridges are much less expensive in Japan, so they could be a very good deal for the money.

All-in-all, it is kind of a nice predicament to be having to decide between all those super-good cartridges. I am envious.

I think one of the high end Koetsu platinums, (like the Koetsu Rosewood Signature Platinum you suggest), would work well. My turntable dealer uses the SME 30 and he only ever uses Koetsu Cartridges. (I think he is now using the "tigers eye" Koetsu cartrdidge.)

One thing though, make sure your phono stage is up to the task, as it has a low output of 0.2 mv.

I use the Koetsu Black, and I am very happy with it. In fact, as it has now broken in, I am considering delaying upgrading to my next cartridge, (the Koetsu Urushi), as this is really sounding good. (That way I can pay for it, instead of putting it on the credit card!) No matter what though, I will keep the Black as a backup cartridge.

Good Luck in your search!