Everyone here is passing on very solid advice. The one thing you MUST do before listening to any of it is to define YOUR goals and be honest with yourself! I myself know i don't care to go over 300hp. I'm an "outlier". I arrived at this conclusion only after i got off of the Cobb OTS tune and onto a Stratified OTS tune.
While i want more power, I don't want all that much. I enjoy where my car is now and at times admit to myself that it can be a bit of a challenge to keep pointing straight. And if i'm going to be honest with myself, driving a street car pushing BT hp numbers would be of little joy to me. I imagine the car would be even more of a challenge. I like to drive hard and when hard equals 370hp of tire smoking and steering wheel wrestling, i don't want it. I want to mash the gas, get around 250 whp and manage it without feeling too out of control. Even at hybrid hp numbers, this lil FWD of ours will be a challenge from a dig.
I know 370hp can be modulated, but i don't wanna modulate. When the mood strikes, i wanna mash & GO! lol And FWD cars with TONS of power are not a mash and go kinda drive. My brother knows a guy who had a 1,200hp C6 Corvette. He actually spun the tires of his wheels doing a burnout on the highway, at speed! He sold the car a few months later cuz he finally admitted to himself that there is such a thing as too much power for the street. lol
I suggest you get a Cobb AP from Stratified (includes a GREAT tune) and see how you like it first. No risk as you'll need the AP to go BT anyway and you'll get a quick taste for what more power feels like. So, again, just be absolutely certain of the driving experience you are trying to achieve and don't get caught up in the HP wars just for the sake of putting down big numbers. But if you like tire smoking and wheel wrestling, then by all means start a build thread go for it! I'm an avid voyeur of BT builds