Help me decide which E88CC tubes i should buy

Hey

I spent 2 days researching about tubes, from technicalities like measurements, what to look for when buying etc how they sound and which sound the best as a common consensus.

I only need a single driver tube for my Decware Taboo MK III, currently i am using a Siemens E88CC with silver shields, 2x Tungsram EL84 and 1x Svetlana rectifier.

Khadas tone board as DAC and Fostex X00 Purple Hearts as headphones. I really like how the Siemens sounds but i am not the first owner of the amp so i can't say how much use that tube has gotten already.

I've also tried the Philips SQ Heerlen '60, which are a bit cleaner/slightly less veiled than the Siemens, they were not new either around 66%/70% of NOS value. So it may not be a direct apple to apple comparison. They seem to boost the midrange quite a bit tho which is very noticable considering that my headphones have very recessed mids.

After testing back and forth i always end up back to the Siemens and don't feel the need to look back, but as soon as i try my Philips for more than 1 hour i start to miss the Siemens. But i don't think that the Siemens are objectively better than the Philips.

Anyway. I narrowed it down to:

Siemens E88CC. cca. Telefunken cca, Amperex 7038 or Amperex PQ US made, Reflector 1975 "holy grail".

They all score well above 100% except the Reflector which are like 95% of NOS spec and all costs around 80$, except the Siemens e88cc might find for a bit less.

Any suggestions?

I couldn't find much info on the Reflector seems a bit of a dark horse except that one head-fi thread where 17 tubes get compared. Really as good as they say or just one persons experience?

It would be interesting to hear your opinions and experiences, i haven't found any posts where these tubes get compared.

Best regards