I've tried Brimars, Sylvania green letter & VT 231, etc. The Ken-Rad JAN matched black glass VT231's that I have gone with in my pre line section are, together with the WE300B, the best tube I've heard overall. About $125/pr...enormously musical, spacious, dark and mysterious with the best bass, bar none. That is,if you can find them... The last Sylvania 6SN7W metal base CHS that I saw went for $300. Ouch.
