In NC, Krispy Kreme generally reigns supreme in the donut wars. Dunkin donuts, generally are a far second; I can only think of a few store locations off the top of my head, and none that I would be willing to drive any distance to get to. The Fractured Prune is always fun - but one can only have a limited number of "artificially" flavored cake donuts. Enter Daylight donuts. I wasn't aware of this chain until we were brought a box - of the largest donuts that I had ever seen, especially relative to the KK size.
Daylight donuts remind me of the donuts I grew up on - large, minimally artificial (not that a donut isn't artificial to begin with, but this is to contrast the Fractured Prune, which has closed). The standard basic flavors and types are all available - cinamoon, long johns, etc.
Limited hours - but yummy in the morning!
Daylight Donuts
http://www.daylightdonuts.com/
1244 NW Maynard Rd
Cary, NC 27513
(919) 388-0150