If your goal is really to get and keep for 10 years and you want to drive it, get the simplest 911 possible, the base car. The more exotic it is the sooner it will break and the more crushing the cost will be once off warranty. I've had a bunch including a GT3RS and while it's a fun car it is a nightmare if anything goes wrong. And more will go wrong because every imaginable tolerance is smaller and tighter. Hitting a curb with the low front spoiler could easily set you back $60,000. Just to illustrate.