Mustangs. Period. lol. j/k I am luck I have the option of driving an 01 Camaro SS everyday or 03 Cobra kinda best of both worlds. IMO- The Mustang is built way better.
I will be honest you name it and I have taken it. Tilley- I agree you will plateau when you do the same workouts over and over. Like arnold says "you need to shock the muscles if you want them to grow". So yeah just change it up every now and then.