949 Racing. Also, in the interest of shaving a bit off the budget anywhere I can, I'm going with a clutch and flywheel package from eBay. It's an 11 pound flywheel (stock is close to 20) and an OEM equivalent Exedy clutch and pressure plate, all for under $300. Normally I'm plenty skeptical of cheap car parts, but these have gotten consistently good reviews on the forums so I'm willing to take a bit of a chance since it saves almost $150 over what I had originally planned to get. Also the frame rail reinforcement kit from Flyin' Miata is inbound on the big brown truck from Colorado.
The budget is starting to come into focus as well. Depending on how I cook up the numbers, and counting a few things I've already bought, assuming a budget of about $500 to paint the car myself, and budgeting for a new set of wheels and tires, the total comes to about $3500. Not a bad deal when you consider how cool this car will be and how it will be good for another 10+ years of worry-free driving. That's my theory anyway.