Looking at these tires for 2003 6MT Sedan, anyone have them on their G or know anything about them?

I was also looking at the Avon M550's seems to get good reviews.

Size is 215/55/17, not sure if moving up to a larger size would make a difference on ride with the Sedan or not...

 

I have 235-50/17 V-rated Turanza Serenity on my 2003 G35 sedan 5AT. I am very happy with my tires, bought from Tire Rack. I would probably have purchased the 215-55/17s but they were not yet available at the time I needed to purchase.

I wanted a tire that had equal parts of performance, comfort, and quiet. Snow traction not a factor as I use Bridgestone Blizzaks in the winter. Not a boy-racer by any means, but I do like the slightly bolder stance of the 235-50.