One of the great things about owning a tube amp is altering the sound with different tubes. Especially ones with auto biasing. All you need is 2 12au7’s to start. I would call Jared at Upscale to get his advice on what would make the biggest impact.
As far cryo goes. I don't have much experience. I would imagine it would be a subtle difference from what I have read.
As far cryo goes. I don't have much experience. I would imagine it would be a subtle difference from what I have read.