Bang for your buck a z06 thats a couple of years old may fall in your price range. Itll be new enough that it should be reliable and is in a performance class thats equal to anything mentioned. While there's a lot of decent cars listed in your list and in general in this thread a few things to consider would be along these lines.
1. Reliability. While anyone can play the car x is no more reliable then car y, most of the cars listed will end up being a bit older. RX7s havent been around for a bit. And you're looking at a older Skyline as well. Same goes for the Supra. Now you can make arguments that they are reliable as far as their age, but these are all going to end up being cars that are more then 5 years old.
2. Parts and Repairs. When any car you buy DOES fail you need to think about how hard and how much it's gonna cost to fix. Most sports cars will be fairly expensive compared to many cars cost wise, but finding parts for something like a Skyline may prove to be incredibly difficult. As would finding a mechanic capable of working on a car they may never have seen (Skyline, NSX, or a FD rotary)
I don't mean to be difficult, but it seems to me that many cars listed are more for the shear novelty of what they are rather then how they can stack up against a moremoderately priced and more common car like a Vette, Camaro, Mustang, etc. If you simply want performance the cars you listed may not be the best options.
