I would say that the main factor here is the different types of music which we are listening. For example these EL tubes are favouring a lot vocal music, piano or maybe trumpets. Therefore, classical and jazz are definitely a better match for them. I listened a few days ago some Corelli which sounded very good on darker tubes. I plan to continue to mix some classical with the "usual" stuff from time to time, but I keep my opinion that for rock music these EL tubes are not always the best match. Regarding Euforia, I wait for @Scutey to come with his own assessment. And regarding a future upgrade for me, at the moment I am very pleased with what I hear and I think that patience is the key to fully understand what I need. I will not hide that there are several candidates to a possible future upgrade and these are: Euforia, GOTL and WA22. I will not hide also that I would like to try a balanced connection for T1 and WA22 might be a good point in that regard. PS. One small thing I do not like at Elise (and also Euforia) and I never mentioned because it is not a technical problem but a design one is the volume knob. I never understood why they made those black on black volume markings which I am never able to see since my front panel of the amp is always in a penumbra. So I guess that soon I'll paint them to white or glue something on it to be able to see something. Anyway, this is not a technical issue, so do not count it.