I had a pair of Primaluna EVO 400's for about six months running as monoblocks. The stock tubes left a lot to be desired and a change to KT88 power tubes and vintage Cifte 12AU7's helped a good bit. However, they never really gave me that tube sound "wow" soundstage I had experienced with my old Cary 6 Packs from long ago. I sold off the EVO's and moved on to a pair of CJ LP275M's. Those are my keepers.
PrimaLuna EVO 400 v Cary SLI-100
I've never owned anything other than solid state but I am increasingly intrigued with tubes. Thinking of "investing" $5K or so in an all-tube integrated to (at least initially) drive my Klipsch Heresys. Any thoughts on these two choices? Is there another choice in this range?