I owned a 1990 Miata. bought it with 50k miles - and crashed/totaled it with about 90k on it.
Now have a 2000 Base Boxster with M030 and 18s.
I had the miata quite a few years ago - but loved it. My miata was modded with intake/headers/exhaust/illuminas/springs/sway bars - it was a really fun car - but honestly, I think the boxster is a better car.
the miata was bulletproof. I had NO problems with it. NONE. I did basic maintenance - but NEVER had anything break.
bang for the buck the miata is a great car - but if I could have only one - it would be the boxser all the way.
no one calls my Boxster a chick car. all the guys at work are jealous.