Definitely still hoping to run the GTI for some autoX days! Still have a set of brand new 200tw tires in the garage that we can't let go to waste...
I thought about an M2C, but the crank hub issues scared me away. I've always been a fan of German cars as well and have dreamed of owning an e30 3 series at some point in my life. Was also considering the GT350 for a while, but those heavier cars are just so expensive to run (and the voodoo V8's oil consumption was a bit worrying for me).
I'm hoping the Miata will be a good platform to learn on. It is well engineered, cheap to run, and doesn't require many changes to handle a large volume of track days (as long as you stick to 200tw tires). I'm planning to get a set of wider wheels 17x9 and some REs or a052s and just get a ton of seat time over the next couple of years. Dream car at some point would be an Evora GT but slightly (i.e. extremely) out of my price range at the moment.