You should PM cryo and see what he can do for you as far tuning goes. If you have a lap top you can get a cable, $40.00 or so and have him send you MAPs for your tune.
I will tell you a catless DP and no mufflers is to loud. I think you have an 05, you will need a catless up pipe too.
I happen to use www.tuningalliance.com
for my Tuner, but seeing how cryo helped out here, you should contact him.
You should also get better brake pads, I got my Hawk pads from www.AZPinstalls.com
email Mike there and see what he can do on a set of Hawk Ceramics and may be slotted rotors. That's what I have on my wagon.
201,000miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here