There has been a flurry of posting recently about the Create Synergy 5AR4. I'm using the tube in my ModWright Sony, and prefer it to my 1969 vintage Blackburn Mullard. In my opinion, it is a real find, since the old Mullards are getting to be hard to find and kind of expensive. It is not a sweet, tubey tube, so if that is what you are looking for you will be disappointed. The create is the only tube I have found that offers the dynamics of the Mullards. The create tubes are offered for sale on audiogon. Check username fork.