The 6 speed will give you most of what you're looking for. One careful choice you will have is the decision between 50/50 and 35/65 power split. People who like a little rear bias will prefer the 6 speed. However, it can give you more oversteer than you want if your suspension setup is not set to understeer off throttle. You either accept being sideways or are forced to let off the throttle at times you may not want to. The rear bias does allow more input flexibility for correction. There's also the matter of gearing which can also influence your decision.