Prima Luna is very nice for the money but I doubt it will better your ET3SE. I have a c-j Classic 2 SE and it sounds incredible driving my Quicksilver amps. Your pre is a Class A component, made in USA, premium parts and build quality, which will be evident when you go to replace the tube. My Classic proved to me that the preamp is the most important electronic component in a system. It blows away my last couple of preaamps , all of which were decent but the c-j was my most pronounced upgrade to date. If you want to "upgrade" change out that 6922EH tube with a Russian 6h23p-eb type 3 from Upscale. I had noise issues with a couple of the stock tubes, replaced with 6h23 and not only is it dead quiet but it sounds much better. That tube is super durable, I use them as drivers in my amps and they seem to last forever
