Recommendation for Brakes and rotors for a 2015 Mazda 6 Touring

I was at the Mazda Dealer yesterday for a oil change, The tech said that my front pads were at 3mm and the rear at 4mm. suggested to replaced pads. The dealer wanted $303 for front and $303 for rear, not including rotors. I declined. My car has 110,000 miles. I had all 4 rotors resurfaced and new brake pads installed about 4 years ago. Any recommendations on what rotors and pads to buy. How much should this complete job cost, should I do OEM or aftermarket ?