I currently have all 3 in my shop. I put my terminator up for sale on here and the buyer didn't have his finances in order. Anyway, I still have for the time being, a terminator, 14 GT500, and a 2015 GT. if I had to choose just one......probably the Shelby, but I really like all three cars.
I regretted not getting them on my 14, so I happy with them in my 15. The just hug you and make the driving experience that much better. Mine is not a daily driver though.