V1.1

My original idea of a Sziklai pair for the output buffer was good. My abort for the first version was based on a faulty understanding of when a BJT goes into saturation. I like the pair output buffer a lot better.

There's also an interesting effect when the input to the pair goes over 1.4V: the first transistor goes into saturation and starts pulling a lot of base current. In my configuration, this would pull down the last gain resister and so function as negative feedback. I wonder if this softens the clipping at all?

(Note there should a Miller capacitor in the last gain stage too.)