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I still think it's a 55-65mph highway car. Anything much over than becomes less comfortable. I have a good amount of road vibration and tire noise.
New tires, Road Force balance and struts and you'll have a more quiet and stable car. I have the stock springs with GR2 struts and it's great. (The original struts had 145K miles on them!) The car is smooth, quiet, and cruises at 85 all day long. Prior to those fixes this wasn't the case... at all! Trust me, every two weeks I have to take a trip that's 300 miles round trip.