I found my 08 had ok power, but worse handled very bad, to much body roll
a little loose in turns etc. I would likely do a cold air kit and tune, to improve performance first.
I would invest your first monies into suspension, then brakes., Brakes not bad with 300 HP, but get almost scary with power.
consider 373 gears for torq. A bit better clutch. X pipe will give you a little as well.
So option one, cost more, but can do over time. Build a motor. long tubes, heads, cams and if really wanna have fun bottom end.
This done right will cost about 6-8k but can do a bit every year. 450hp when done.
Option 2 is to get suspension, brakes etc up to snuff. then look at SC, turbo might be a little cheaper.
Keep in mind that engine is good for about 450 @ the wheels and no more than 10lbs of boost.
Any more you are playing with blowing it up. Off the shelves systems are from about 5-8k
and a weekends work, depending on how mechanical you are.
The set up I went with was a lot of work, but all in was about 4 to 4500 including my trip to Pete's
So if your willing to do a lot of work, you can save 2-4k and have same end results.
You will need a very good tune or again you risk blowing it up.