R11 in the alternate PS is 3K2W. Wonderful to see 11 downloads already. You will want to adjust the value of R10 where you have 200V's between the cathode and plate of the 6Y6. If my calculation is correct you will be running the plate dissipation at 10 watts. The 6Y6 is rated for 12.5 plate dissipation. This is at 50ma. This is from Maynard. My experience is making a tube or transistor work gives better sound. That is as much as can be safely run. Nelson Pass runs a lot of bias in his transistor circuits for this reason.
There once was a reviewer for a noted publication that was an active member on this forum that said the best sounding amplifier he ever heard was a 1 watt one. Not this one so as not to get the wrong idea I am saying this is the one he was talking about. Just for those that turn their nose up at just one watt. Maynard's stereo power supply has two sections. Two PS sections with one transformers. My builds, this will be the third, just use one PS section of the schematic. Two would be better but one has always been good enough for me. Keeps the build simple and less expensive. Plenty of imaging with big soundstage with one PS section.
Just for comparison below is the power tube for this amplifier vs the one for the Decware Zen.