I changed from Nitto NT555's to Falken 452's.
The road noise change is very minimal and could be due to the tire brand and not the sizes. I am happy with the new tires, they look a lot better on my car and handle well. Overall I'm very pleased.

 

Thanks so much for all your replies and advice!!! So I put the Continental DWS 245-35-20 and 275-35-20 on my car. The difference is really significant. The ride feels almost just like my rental G37 with 17s!!! I'm really surprised how much it makes a difference. One thing I'm a bit worried about it that that rear tire may be a bit too tall. I'm haven't had any rubbing yet but it doesn't leave much space at all for the suspension. Also, I've read that people have had bearing issues with a 275-35-20 in the rear? Any of you hear about that? Luckily, America Tire Company is really nice and will change me out to the Continental DWS 275-30-20 if I have any problems. Thoughts?

 

my car rides bout the same when it had the 245/275 combo compared to the 225/245 setup i have now

 

I would swap the rear tires out for the 275/30/20, a 275/35/20 is pretty tall.

 

I think the only way to get a softer ride is taller sidewalls because my setup 245/35/20 and 285/30/20 vs my wifes setup 245/40/20 (very comfortable ride)

 

stock S

 

Thanks

 

Yeah. Looks like I'm going to want to go back to 19s or 18s and get that high sidewall