To put things into some context, I bought a 5g 260z 2 seater as my first car...nearly 10 years ago, and in ways wish I'd bought a 10g one as a second car instead, as you get a lot more for your money the more you spend, and will save it in the long run. At the time I looked at a couple of 2-3g 2+2's and BOG is the word that comes to mind.
Sure it's fun to have a zed as a first car, but not only are they too nice to use as a daily as don't survive even a light knock very well, but I missed out on the most appropriate time to own a fully sick lowered bogan mobile, as I have a soft spot for VH SLE's...
But in all seriousness an mx5 or s13 is probably a wiser/safer choice for a fun, first, 'only car', as its nice to not be dependent on a car you want to play around with. If the car doesn't come with Rego or a RWC there's probably going to be a fair bit of work to get it up and running, so just depends if you're in a rush, as I never enjoy working on my car when there's a time limit involved.