Bopper,
I've used all three of the tubes you listed in my amplifier but have no experience with your Canary. The EML XLS and the Sophia RP are much superior to the EH 300b in my SET amplifier.The EH could be a better match in your particular push pull amplifier than it was with mine. The EH is also much less expensive and you'll need 4 pairs for your mono blocks.
Charles,
I've used all three of the tubes you listed in my amplifier but have no experience with your Canary. The EML XLS and the Sophia RP are much superior to the EH 300b in my SET amplifier.The EH could be a better match in your particular push pull amplifier than it was with mine. The EH is also much less expensive and you'll need 4 pairs for your mono blocks.
Charles,