A tune will be the best you could possibly do to your car at this point. However, I will throw out the caution that with the increased boost you may find yourself chasing small problems here and there such as pesky misfires. After 28k miles, my spark plugs were toast. After 37k miles I had to replace the ignition coils. Even with the occasionally problems, a tune makes a night and day difference. Good luck!
BMW '11 E90 ZCP M3 Jet Black/ Dinan Intake and Dinan Exhaust/ Lux V4/ 25% Tint.
*M3 E90 stock stock exhaust, and assortment of exterior OEM parts for sale! If interested, please send me a PM.*