Congrats! I love those wheels! And the color too, but I'm a bit biased.
I'm with Sean. Give it some time before you start messing with the hp. On my 2012 I used to put it in Sport Mode all of the time. I'd get a feel for the car the way it is set up from the factory first.
Is this sport mode an automatic transmission thing? Pardon my naivety. I have the MT82. Am aware of advancetrac sport mode but was under the impression it changed the nanny factor on the stability control, not throttle sensitivity and engine mapping. Did they change this on the 2015?