[MKBMF01]

I recently gave my car for service about the brakes, the dealer measured them and at only 35k miles he is suggesting to change all 4 brake pads and rotors. the quote he gave me was for $2000. My question is that should i get the brakes from dealer, or get the parts online and then get it done at local kauffman tire, or just get everything from kauffman tire, parts being aftermarket and not OEM. Please suggest me a way to go on these are they any different if i get it aftermarket or is it necessary to get from dealer. Thank You in advance