I have a 94' blue miata that I love and next summer I'm thinking about putting a 04' rx-8 rotary in with a Garret T4 turbo charger... What do you guys think?
The Renesis is notoriously hard to turbo properly. It can be done but it will take a lot of money. You would be better off getting a TII engine and dropping that in.
With the money spent on that swap, the headaches it will present, and the results present have in the end, I would opt for an all out turbocharged 01+ engine or simply a LS6 V8.