Best tires and wheel size to quiet road noise?

I would go with the original specified tires for the car and choose a highly recommended tire like Continental, Michelin or something similar. Remember, the problem with Michelin tires is they make a lot of different grades in different price points. Select one of their better grades; the devil is in the details. Some people think that Continental tires are not very good, they are mistaken. See this link below, http://articles.courant.com/2012-09-29/business/hc-ls-consumer- reports-tire-ratings-20120929_1_performance-all-season-tires-winter- tires-michelin-primacy-mxv4

Link wouldn't function, perhaps too old. Why not switch to 17" wheel, same as on the 2.5 version of car?

http://pressroom.consumerreports.org/pressroom/2012/09/my-entry- 1.html

Try the link I just posted. Why are you looking to replace these tires so quickly? It's a 2015 model? Check your owner's manual.