Hi lentov...and a belated welcome to our thread.
Being the guy who first ventured the idea of an 'Elise' to Feliks-Audio, but then felt it was capable of a good bit more - hence the Euforia! - I suppose I'm somewhat biased!!. But I can assure you that, as others have mentioned, as soon as I heard Euforia I just
knew this was a different animal to my beloved Elise...and
nothing like (affordable!) solid state lol!! Unless you mean excellent speed; clarity; good extension at both ends of the FR; solid 'grip' and control of sound delivery...and that's for starters
. Plus other tube 'goodies' that you obviously recognise already. Add on a wonderful soundstage - which will, like other aspects, depend to a certain degree on the tubes used of course - and this is indeed a special amp. It also delivers a much 'bigger' sound overall than Elise, and its upgraded components will surely help this amp scale much better, in line with any upgrades made to the rest of one's system.
As already stated, if funds permit, it does therefore represent the 'better' buy, rather than perhaps later on feeling something is 'missing' and regretting not going the extra mile in the first place!
I know this decision is easier said than done, but I wish you all the best in whichever direction you decide to go...CHEERS!...CJ