4 speeds are fun, but automatics are consistent, a little easier on the drivetrain and just about as fast if set up right.
Given that everybody isn't Ronnie Sox, the auto takes that part of human error and skill (or lack of) out of the equation. Read that as a poor driver with an automatic will beat a poor driver with a 4 speed.
Its really becomes more personal choice. I've owned both and like them both, but my preference is for the automatic. I have mine set up the way I like it with an ancient Fairbanks kit and cut down governors. It will behave itself in traffic and at WOT it has a hard 1-2 shift and a solid 2-3 without any overlap. I can let it shift itself and it will shift at WOT around 5500 RPM. I have a modified 11" convertor (another ancient Fairbanks piece) that might get replaced with a 10" depending how I finally decide on the engine "package" this time around.