I can definitely understand the wear and tear issue...and of course all of us who track the GT understand the risk of a wreck. But I am not sure I buy the notion that one needs all of these upgrades to "stay in the game." As you know, I am also a novice, having been to a half dozen driving schools and club track days...and, without a doubt, the rate limiting step for me is seat time not brake horse power. As I have progressed, I have noticed that most of the faster drivers are simply more experienced (usually running a lot less hp)...and in many cases by the end of the day I am passing most....not because I am a good driver but because of my GT's capabilities. I guess it depends upon what your goal is...if your goal is to simply drive faster and faster and you plan on going to the track more than 10X/year, then maybe a dedicated track car is what you need. But if less, then I would consider continuing working on your driving skills. I like the stock tires because I can feel them...and they tend to let me know when they are about to break loose. My brief experience with track tires on a race prep vette was fun...and they will let you take it to the limit...but for me it appeared that there was little warning when they broke loose. And since I have little experience in "saving a car", I thought it would be best if I kept my car stock and worked on my skills.
Having said all this, I would also say that the GT is a car I would not want to wreck..but, on the other hand, she was made to run. God save the Queen.