Never buy 0 offset wheels for a Miata. If you want to look at deals on wheels in the proper offset to fit a Miata look at Goodwin racing website.

But think of the burnouts you could do with a 15x6 and street tires. Traction wouldnt exist

I'm really only looking at 15x6 wheels for ES spares for a season getting to know the car in mostly stock trim, and tweaking the handling until I start adding more power. So far, it's looking like NB wheels are probably the best option under 15 pounds a wheel. Thanks for the tip on Goodwin, that site has a lot of information. I hadn't really been considering 15x8s because I was unaware they could fit without rolling and pulling, although I'm tentatively planning on converting the car to STS next season, and 7.5s are the max width allowed.