The Studio's, 1 and 2 and 2 Tower, and the Thermionic series, and Theatre 4 will probably be good with most all of the 2A3 amps. You may do a search for "tube friendly" and see what comes up. If it's push/pull or paralleled tubes, you could use almost any of them. Wayne also says the Bottlehead Paramours drive most of the line, even though SET.