The GTS should be a good choice, one of the instructors with the group I run has one and they love it.
I am curious though, if you were to try and put all your unfortunate issues you encountered aside,and do a mini-review - how did you ultimately find the wavetrac & Ohlins (but specifically the Ohlins) combo for the track days you did get out? Would you say the Ohlin's were worth it over the GC DCC coilover kit?
I began to experience regular suspension faults with the OE DCC struts/shocks starting in 2018, so I had to do something. Those faults caused DCC to shut down and I was left with Armstrong shocks with no computer controlled dynamic valving behind them. DCC is actually doing some very cool sh*t and it is keenly missed when you're pushing the car on track. KW Clubsports were also on my list in the fall of 2019 when I did all these mods, and I'm sure they would have been fine too. Ohlins won the availability race. As has been discussed in other threads on this site, you also want to run much firmer rear spring rates. (noobs reading this, refer to the first post in this thread for details on what I was running)
I'm not sure I'd do the Wavetrac again since the cost to harvest that exceeded the price I could get for it, so I left it in the car when I sold it.
A lot of our instructor corps in the Audi club run Porsches of various sorts. When it became apparent that I had to replace the Golf I decided I wanted a car that would be fine on track without needing modifications, and also do ok as my DD (at least for the next couple of years) and a Porsche is one of the few cars that could make that work. I did order my first mod today though: a set of Tarrett Racing brake caliper studs.