I'd have to agree with that, in terms of the 911 versus similar true sports cars. The 911 is the only one that you can really live with and rely on.
I think I would quite enjoy a Cayman S as a summer DD, but that's just not in the cards at this time, if ever: you see, my personal little financial mantra goes like this... "I hope to have the income to buy a brand-new new $70k car... and the good sense not to."