Nick , seriously drive a GT3 RS if you haven't yet....just yesterday had a blast in it again. As to the exhaust note in sport mode the valve opens from 3k rpm in normal mode from 4k onwards - I like the flat six shreeek very much it produces - it's there but not as dominant as in a Ferrari. I also looked at a 430 Scuderia - but if people turn their heads already before you pass them - I found it very embarrassing....very cool for 10 mins - thereafter to much for the roads over here at least....

Guess you have to decide for a "cruiser" or something more raw - like in my case -that you might drive less but with 100% enjoyment. 

Alternative : best mix was the SLS for me....