I used several charts/tools provided by this incredible thread when deciding on my setup for wheels/offset/ride height/tire size etc. I am including some useful information here. Just glancing at the chart, with stock height, your fitment may actually be a bit more flush than mine since I am lowered. I can't comment on what the gap would be (I would imagine just fine but don't take my word for it, I had the coilovers installed after only 800 miles on the car). Use this link, as I found it pretty helpful:
http://www.frsproject.com/tire_size.php and a few others (repost from the beginning of this thread):
Fuji Online Shopping Simulator
Tire Rack Simulator
Tire Size Calculator (miata.net)
Wheel/Tire Size Comparer Light (rimsntires.com)
Wheel Offset Calculator (1010tires.com)
Wheel Weight Topic (m3post.com)
WillTheyFit.com
Also, the chart at the first page of this thread.