Took my CX5 2WD auto to the Mazda dealer today. They test drove it and said the road noise was normal. I asked them to check the door seals for fit and they refused. The rumble from the front tyres (Yoko Geolanders 17") is quite unbelievable. This is a brand new car, 2 months old, 1000 miles on the clock. Will be selling this car soon and will not be looking at another Mazda.
You will take a much larger financial hit on a new car than you would on new tires......