I too had to recently replace all 4 tires and rims, and I paid 170/rim, so 160 is a fantastic price. Unless you want to spend some more, and upgrade to the 19" sport rims. I personally went outside the box and got Goodyear Comfortred Assurances put on mine. I had them on my old I35, and they were great. It was about 200/tire, and they're the quietest on the market. I know everyone loves Pirelli, but I just can't stand buying a whole new set every 1-2 years. That's insane to me, personally. P6's in particular will only seem to get you 12-20k miles depending on driving habits... The CTA's do amazing in snow, rain, or dry pavement. They're not super sporty by any means, but since the M can ride somewhat stiff, it's nice to have that much more cushion to it. Not to mention they seem to be pretty darn fuel efficient as well.
I might be alone on this, but I feel if you're looking for traditional Infiniti sportiness, you're buying a 45, or G. The old Q's and M's were more of a Grand Tourer than a speed monster. Just my humble opinion
