I found that running 15 psi in the front tires (which is also what JD recommends) and 10 or 12 psi (IIRC, they recommend 12, but I tried both) in the rears makes the ride very nice. Don't wait for the blades to need replacing. The G6's really make that mower come alive. Much better than the stock blades. Check the pitch of you deck on a nice flat surface too. The dealerships rarely get it set correctly. There should be at least 1/4" of pitch to the blades when they are lined up front to rear, with the rear being higher. You can buy a handy gauge at a Deere deaalership for bout $8-10 that makes checking the blade height and pitch easy.