You mean EL 34's don't you? In which case (if you want the ultimate in sonics) I would recommend the NOS Genalex (but VERY expensive!)
JJ currently makes a KT77 that a lot of people seem to like, and they're not too expensive:
http://thetubestore.com/teslakt77.html
JJ currently makes a KT77 that a lot of people seem to like, and they're not too expensive:
http://thetubestore.com/teslakt77.html