LCD-2 or3 I would recommend the C3g > 300B why a 45 or 2A3 when the transformers cost
the same for the 300b and it could also drive speakers. Whatever rectifier is not that important.
On a high quality tube amp the output transformers are the most important part even over expensive tubes.
JJ300Bs can be got for $200 a pair and sound good.
I like to use tubes that can be got for cheep and outperform these boutique over priced tubes.
I can vouch for this. My LCDs and HE-500 sound excellent with the C3G-300b
I own a few pairs of shoes. Each serves its purpose. If I had to decide on one shoe to be the best of all shoes it would drive me nuts--let alone wreck my feet. That's why I own a few amps and a few headphones and why I don't really try to best one over the other. Just saying. :) Right Ultra- ?
There's no one amp or headphone to serve them all. I wouldn't know which one to choose. But if I really had to choose 1 amp and 1 headphone that could do all pretty good, it would be the Sennheiser HD650 with a Bottlehead Crack (as I don't have the Glenn OTL)