If you're not going to track the car (road course kind of track) or repeatedly make the car stop from high speeds, the 2-pot calipers are all you need pretty much regardless of how much power your engine is making.
What you could use is brake pads that have better initial bite and higher temperature capability, and better brake fluid. The only caveats are that track-rated pads will result in more dust and maybe some noise, but those are small prices to pay if you're going to drive in a manner that demands better braking.
FWIW, I used to run the little 12.4" 2-pot calipers on the road course, 20 minutes at a time or longer. Mid-level track pads, Motul RBF600 fluid, and some supplemental rotor cooling. That's way more than you'd get in any street driving, and more than you'd ever need for canyon running on those 20x8.5 wheels where you feel at all comfortable doing.
My 11" wide front "track wheels" (plus a very thin spacer for each) have a resulting offset somewhere in the mid +30 range, and my -2° camber effectively makes the scrub radius a little bigger as well. Nothing unusual happens either on the street or at the track at g's well beyond anything you're likely to ever see in street driving.
.