If I had to do it all over again... Probably would've skipped the whole Z phase and gotten an E30, which was my first choice YEARS ago, and it's also what I finally have as of September. I bought the Z thinking I'd enjoy the metal work, body work, etc. What I found out is that I absolutely hate working on cars. There's a lot of bolt on support for E30s and they're easy to work on to boot. Works for me. And my favorite thing about it? Well, aside from the AC, heat, nice interior, EFI, and all that... It has no rust. None. I love it.
If I had to do a Z again? I'd start with a solid, complete CA car, instead of going thru a bunch of rust buckets. Sooner or later, I'm going to be selling all my Z stuff. I'll probably end up with another Z at some point, but it's going to be a while. And I'll probably go with an RB25/26.