Favored KT-88's for Sonic Frontiers amp?

I have a pair of SFM-160s that Chris Johnson heavily modded - his "full monty" in Chris' terms.

Anyway, during this extensive mod, Chris told me that the Gold Lion KT-88s are the output tubes he would give his highest recommendation for use with the SFM-160s. Of course, others will work.

Though I have not tube rolled, I am very pleased with his recommendation in terms of reliabiity, sonics and overall enjoyment of the music.

I'd take Chris' advise, even though I've never used those tubes in my 160's. This amp, as least my unmodified one, has high plate voltage and needs rugged tubes. A lot of KT88's aren't up to the task. I've used SED KT88's but didn't like the tone even they didn't fail. I ended up using SED 6550's and if/when I ever retube them I'll be trying the Gold Lions.

Thanks, flyfish, the Gold Lions were on my short list to send him. They seem to be a choice for many, with Leben gear also.
Take care
Chas