Sorry about the delay Ben. I did not see your response.
I use Welborne Labs Laurel IIx with my Super Eclipse. These are SETs based around the 300B valve. Mine have the Ultimate Upgrade kit fitted, and Full Music mesh triodes. I use Sylvania 6SL7GT VT-229 driver tubes (from 1945).
I live in an apartment so I have all the volume I need from 8 watts. If I were to upgrade the amps I'd either go for Ron Welborne's DRD amps (300B) or a balanced pair of monoblocks like the BAT VK-150SE (yes, I know that these two could not be further apart in topology).
Regards,