I had leased a 2017 NSX but returned it early because I never fell in love with it.....it did not seem engaging and lacked "soul". I'm looking for a DD convertible, as well as something to take to 2 or 3 track days per year (willing to do some mods for this). I started looking at 2016 M4s than saw some comparisons with the 2018 Mustang GT...I know...very different cars, but close in performance, at least on paper. Cost is similar, but the Mustang will have a couple of years of factory warranty left...the M4 will require an extended warranty. Which would you choose and why? Thanks in advance!