[RWebb]

a lot of it surely is being transmitted that way

both suspension and tires for a race car or "sports" car are at odds with NVH criteria - that is one of the tradeoffs you make for a sports car

tires for a high performance/luxury sedan often maintain good performance and good NVH traits - tho neither is maximized
-- you may want to look into those

also: make sure your suspension has been renewed and devote attention* to noise reduction techniques on the body of the car

* that translates into blood, sweat, and tears (plus money, weight and angst)