I owned a '93 Miata for 6 years before getting the '06. Bought from a dealer on eBay. This is a terrific car, fun to drive, and is my daily driver. Top seals well and keeps me dry in inclement weather. It's got great power/weight ratio and the 6-speed box is great.
Seats, top design, engine power, 50-50 weight balance, it's just a great package altogether.
I have trouble from time to time with the top bunching up when I put it down quickly. Drags on one of the ribs. Dealer has not been helpful with getting that fixed. Overall a pretty minor annoyance.