The first system is always the hardest to dial in. This is because the room plays a bigger part in the sound than most people realize. Once you learn your room it becomes much easier. I wouldn't get too excited about 300B or any other single ended amplifier. They do some things very well, but they also have their limitations.
That Audiophile Thing
It took me years of going to "high end emporiums", reading every audio magazine printed, including those in the UK, and listening in that "audiophilic manner" to get my system together. It has the holographic sound I worked so hard to achieve.
Recently, I was admiring another audiophile's exquisite system (not personally, but here on the Gon) and I was wondering how long it took him to put it together. After admiring his system, I began listening to mine, and enjoying the music immensely. While I thought about his system, the thought also came to me about the headache of putting a new system together in "your" listening room. Even if you have the money, you don't just plunk this stuff down in the listening room and get good sound out of it.
To complicate matters even more, this is a 300B system utilizing extremely efficient speakers. Although I know "zip" about a 300B system, I'm positive from what I've read, that his sound is exquisite. My question to you, is after taking into consideration all the "minutiae" involved in getting audiophile holographic sound in your listening room, are you ready to do it all over again? Money is not a consideration in regard to this question.