Glad you found a rig to your liking. I'm surprised no one recommended the venerable 800RB though. GK stuff IS punchy as hell and can do the warm/fat thing very good. They have a reputation for hi-fi, sterile sound, but in my experience, with judicious boost settings, that reputation is unwarranted. Plus, they are CHEAP on the used market. I bet that even in Spain you could find one for a song.
PS: If you want tubes, there's really no substitute for them though. No amount of technical wizardry is going to make a SS amp react like a tube amp. Ask any guitar player...