The Woo 6 with the right rectifier and the 650s are wonderful and not radically far off in sound quality from the 650s with my current set up of the maxxed Woo 5. I have not heard the Burson other than all the raves here. Good luck.

Thanks for the info. I am sticking with my GZ37 and shopping for some GZ34s. Still, I loved that 274B sound while it lasted.

I have used several rectifiers with my Woo Audio 6 amp ( bought in 2007 ) and was thinking about an EML 5U4G. Before buying the EML I happened to mention that I had used a Sophia Princess Mesh Plate 274B, purchased from Jack Woo, but this fantastic sounding tube failed after about a year. The...