Im having a real tough time getting great results with that combo.
the EV really is a speaker that claims to be pushed hard. with the Mk series this isnt a problem at all, since you can get usable gain from the preamp itself, but with the Stiletto is a whole other world. the way it was designed you have to make a combination of both power and pre amp distortion. the EL 34s have a huge part on this, they're the type of tubes that color your sound, whereas the 6l6s are "cleaner" tubes.
having said that, imho the Stiletto with the thiele only works good after you set your masters at noon-1 o'clock and this can be VERY loud even for live applications (trust me, the sound guy will cut you out in a beat, unless you're playing huge venues, for like +3000 people). but have to be honest, it sounds DELICIOUS that way :twisted:
For clubs, pubs, bars, house etc a lower wattage speaker will work better with the stiletto, imo. when the speaker also became part of your sound and breaks up earlier.
my 0.02