Seeing this made me realize I owe you an apology for never responding in your thread from last month--must have slipped my mind. Sorry! So, to pick up that conversation:
I have a lot to learn and am not even remotely close to exploiting the limits of my GTS. I wouldn't even consider an RS if they were guaranteed to be around for another 5-10 years.
This is a great mindset.

Based on the résumé you posted in the other thread, yes, you are correct: You are
years away from growing beyond your GTS--many years, if your planned 15-events-per-year schedule proves unsustainable. It's also important to get as much instruction as you can if you really want to progress; otherwise, most of us tend to unknowingly cement bad habits that limit performance.
A former chief instructor with the BMW CCA (NJ Chapter), from whom I was fortunate to learn a bit before he passed, famously put it this way:
Blake Smith said:
I can teach you to drive fast in a modest car in two years but in a hot car, it may take five.
Blake was one of the architects of the CCA's Instructor Training School (ITS). He knew what he was talking about.
Consider that the GTS is
already a seriously hot car. A GT4 RS is more like nuclear.

You have no (usable) garage space; the RS is by most accounts, borderline torture as a street car; and if your goal is to be a fast driver, the GTS is a better learning tool. Sure, the RS is an insanely fast
car, and you will likely have an absolute blast with it on track...but you might find yourself, for quite some time, getting gobbled up in the corners by faster
drivers in lesser cars.
So be honest with yourself about what you want from the hobby and your goals for your development as a driver. That will help you decide whether to jump to the RS now or wait. If the latter, there is always the second-hand market--these cars will be around for years.
