Balanced Top Speed and acceleration. The first/second/third/fourth gear are short to ensure acceleration, the fifth gear is a ballanced one ands the 6th is only for topspped (280 Km/h). There is no problem braking while turning, the car won't oversteer. If it starts to oversteer simply adjust the rear brake balance.
tubago - I will get that fixed so you can update the setup proper. In my tests I didn't find above 5.000. What's the highest "Final" ratio you've encountered?