WTF should I buy (A consolidated list of bad decisions)

[RawrImAMonster]

I'm still planning on selling the M3 hopefully before too long and I really haven't figured out exactly what I want.  I'm really pretty open to what I want as I don't have any specific plans for a second car.  I'm probably not ever going to seriously get into tracking because it's just way more money than I want to spend, but I would like something that can handle an HPDE or two without much issue.

Budget is around 15k but I can stretch it for something I'll really like

What I want:
RWD
Manual
Highly prefer 300hp+

What I don't want:
Something that has a lot of serious flaws and will need a lot of preventative maintenance (think e46 m3)
Something I've already had

Some things on my radar:
370z
350z
99/01 cobra or 03/04 mach 1 (Mach 1's don't have IRS though so probably not)
Z3M (probably S52 if I got one)
E30 to do a s50/s52 swap
C5 corvette
CTS-V
Boosted E36 M3
GTO (not a fan of the looks so probably not)


Anyone have any other suggestions that I might be forgetting?  If I don't find something I really like I might just wait a while until I get desperate for a manual.  The GTI with a tune is fun enough to drive that I could live without one for a bit probably.