Best 300B tube for Cayin 300B amp?


Just looking for opinions, I have the Sophia " mesh " 300B Princess now, anything anyone has heard but likes better? Looking for a second pair of tubes.
oceanica
"Any one try the new Genalex 300B?"

I have a matched quad I'm using in a Cary pp. I'm happy with them.
For Cayin and other Chinese 300B amplifiers designed under 220V AC 50Hz, I would recommend Sophia Electric Carbon Plate Princess 300B tubes for the following reasons:

1. Sophia Electric Carbon Plate Princess 300B was the top of line model from 2006 to 2010. It must be that good to be the flagship model for 4 years.

2.At $600 per pair is a great buy for its sound and long life span.

3. Very different sonic style compared to your mesh Princess 300B tubes. It is the Second best sound only to the Royal Princess 300B from Sophia Electric

4. Sonically, it would transform Cayin and other Chinese 300B amps to another league

5. Magic mid range and the best bass extension for a 300B tube. The high frequency is super smooth.

6. Extra dissapation margin over the 40W rating and still a WE format tube with traditional 300B electro and sonic characters.

WA
question for washington high end audio does ur comment on 10/14/11 re sophia electric carbon plate princess 300b for cayin 300b amp ,,also pertain to the 120v version
tried the sophia electric carbon plate ,very good ,then upgraded to the 1200 per pair sophia electric royal princess
wow, what a revelation like the performers are in my listening area cant really think of anything negative of course no overhyped bass slam,but again thats not what music is all about,cayin a300b set. omega super 6 xrs custom built by Louis @ omega speaker systems ,norwalk ct.DNM solid core precision2 speaker cables again this is my findings and opinions.which is not gospel