OTL recommendations for 105+ sensitivity horns

I'm not sure if this is even a practical direction as I seem at odds with noise floor and power requirements and negative feedback which I am trying to minimize. 2 watts is just a bit too low but 10 watts would be plenty. I scanned the OTL Asylum threads and nothing immediately jumped out at me. Thanks for any guidance, pleasant / horror stories.

I was leaning towards a 45 tube based SET but wanted to cover this angle before a commitment. The noise floor on my P/P 300B is waaaaaaaaaay over the top for my edgarhorns.