Hi
The 300b project is not a commercial product now. It may be next year in partnership with someone, but it is not my place to do business here at all. Not appropriate. I am sorry, but I stopped modding gear or working on vintage gear maybe 4 or 5 years ago. Just no time or desire. If I didn't build it, then I no longer touch it nor look at it..... Just too many other projects.
I don't want to seem like I am dismissing the 300b integrated in question here. I am sure it is very good value and would have a pleasing sound. As we have discussed, it can no doubt be improved with better signal path parts. It will have a limit due to the circuit and power supply design, but could still sound quite good. Just not superb. It simply cannot go to that level because of the basic design, and that is just fine because that was not what it was intended to do. The 300b project I am doing with Lynn is an attempt to make a state of the art amp, so not really the same design goal:) Build the best amp you can, and then figure out what it has to sell for. There is no price point target.
cheers,
Don