I still want to remind all of you not to lose sight of the fact that the original poster, Mr. Tmesselt, is new to tubes and that your advice about "speakers first" though well intended and basically true, may cause problems for this individual, whose main interest right now is an entry-level TUBE experience. Not a speaker-shopping spree ;-)
What if he were to fall in love with some speakers that had special (not to say fussy) amp requirements, or were poor candidates for tube amplification in the first place? To avoid his selecting speakers that might not even work with a modest, user-friendly tube amp, or winding up with speakers requiring a tube amp that might be expensive, high maintenance, or not practical with a wide variety of speakers (i.e. not easy to resell) I remain convinced his first experience with tubes requires a more conservative approach.
Gaining basic general experience first, with a modest, predictable and trouble-free setup, insures better, more informed choices in the future. Even if the man has unlimited funds, if you want to advise him responsibly, make sure they will be well spent by providing him with a solid experience for making future purchases.
With all due respect to Tvad, I think the reverse approach is best for those people who have already gained some basic understanding about tube audio and have already defined/refined their personal sonic preferences.