There is also the Silver Sport 4-speed automatic... I believe its based on the GM 4L60 tranny... I've heard good things from pleased customers... I'm considering it myself.
Probably the best option if cost is not a factor, looking at $6k or more. I’m all in at $2.5k you could go cheaper if you don’t want/need the automatic control. Still by far the best money spent, car is so much more enjoyable to drive. Only 2500 RPM at 80mph, 3.73 gears