I believe Cary makes some nice integrated SET amps. They'd likely have a beefier power supply than the Decware or ASL Entrope mentions. The power supply plays a critical roll in amplifiers and can make a huge difference in SET designs. I guess it depends upon just how much you want to invest as the SET amps with the better power supplies are going to necessarily cost more. The less expensive designs tend to use smaller power supplies. I think the Cary 300sei goes for around $1800 used - none currently available. You can read the Stereophile Review for it here. I believe there a few other reviews online you can google. Speaker-matching is critical with SET and will certainly make or break the experience. I cannot stress that enough. If at all possible, audtion the matchup with many types of music, particulary the most demanding you are likely to play. You're doing pretty good with the Klipsch's though 94db (Heresys?) is at the lower end of what I would consider for an 8 watt SET, and may be a stretch with some music, and or in a larger room depending upon your expectations. Still, 8 watts should work out fine unless you are really pushing them in a larger space. If the latter I might suggest trying out a push/pull design using the same direct heated tubes you are considering in the SET amps. I had a pair of Wright Mono 10's that were fantastic amps and came very close to a SET sound using a pair of 2a3's putting out 11 watts. In many ways it bested the SET sound, but fell short only in the areas of soundstage dimenstions and overall airiness. Midrange was at least the equal of my SET amps though, and it was no slouch in the areas I mention as less than SET performance. There are other designs that are similar, as the Wrights rarely come up for sale (I just sold mine about a month ago :-( Can't really stear you in one direction there, but don't rule out that option as a better match for 94db Klipsch speakers.
Good luck!
Marco
Good luck!
Marco