If you are a bit heavy with your right foot (like I am) you will benefit from upgraded brakes. I'd get the best you are comfortable spending the money for. My old Denali went through it's first set of front pads and rotors in 20000 miles, my current Denali has the GM/Brembo fronts and I have 23000 miles and they are worn, but not quite shot yet. I should have upgraded further and may still do that.
That seems very fast to go through pads that quickly. Are you choosing performance pads with a softer compound or do you constantly drive in stop & go traffic? I've had many vehicles go well into the 50-60k range on pads and still have life to give.
On a different note... I technically did my first upgrade yesterday....
FREE TAILLIGHTS!
Not exactly free.. but a dealer warrantied item at zero cost to me. We noticed the drivers tail light died out and after a bit of reading it came about that GM has an active recall for
ALL 15-16' w/ less than 72k miles. You'll get some shiny new ones if yours have issues. Also, if you've replaced them in the past you can submit paperwork for reimbursement.
I was glad to stumble on this because I didn't want to throw down $600 for a new set!