Well, I "finally" pulled the trigger today and got a full set of new Michelin AS3+ ZP tires installed, taking off the PSS tires that came on it. Wow, impressive difference in ride (much smoother over small asphalt imperfections), thrown road debris hitting the rocker panels (I didn't hear a single "ping!" while driving about 60 Km today on the way home from Toronto) and the big difference was interior sound levels - I no longer have to crank up the radio volume to hear even the tiniest bit from the speakers, the radio actually started to sound decent. At least a 25%, maybe 30%, reduction in interior sound levels at highway speeds (110 to 120 KPH).
Wish I'd done it a lot sooner. I was at first leaning towards the AS4's, but my buddy wasn't overly impressed with them for the handling, where at least on public road driving so far I am having trouble feeling the difference with the AS3+'s.
Good deal, too. With the Gouge and Screw Tax/HST, and the tire recycle charge, worked out to a lot less than $1,800, plus I've just filed for the $100 rebate cheque from Michelin.
My only regret is "wasting" all the remaining treadwear potential on the original PSS tires, at 23,000 Klicks, they were still less than 1/2 worn. But still worth it.
LLC