I agree with you about wanting to drive them all, but ownership experience is quite different than just driving them.

When the time comes to buy a new car with my money, I'm not convinced that paying more for a Ferrari or Lambo is better than staying with Porsche. For example there is currently nothing in the Ferrari or Lambo lineups that I would rather pay for and own more than my GT3RS. Sure a new 458 is nice, but realistically I cannot justify its price of entry over my RS.