You must not really have read all of my posts. My whole point was for a serious track guy, ie track times are the most important, that the GT was a better place to start. If you want a mustang with a little more capability and swagger/panache, then the Boss would be the way to go. I even said I would buy the Boss for that reason. I would throw an intake, tune and longtubes on one and daily drive it. However, for an avid track guy, the GT is a better way to go, IF you were going to use a mustang (there are better platforms for a track car, but sometimes we want what we want).I said as a total package. There are plenty of ways to go around a racetrack faster that don't cost 40k.
Would you really rather have a modded GT that may or may not end up slightly faster than a stock Boss? Even if you did achieve this your overall cost wouldn't be much different (unless you throw in resale and with the Boss you would come out much better overall).
The Boss will still be way cooler and have way more potential due to the engine.