While I was up in NC I had the chance to try out my sister's large set of Copic markers. These are very nice art markers that blend easily and you can change out the nibs and refill the ink, they are also very expensive retailing at $6.99 a marker but you can definitely get them cheaper. I am used to Prismacolor markers but the Copic's are far superior. They make it so easy to color!
I colored these two birds from my sketchbook (they are the original sketches from some of my field guide paintings):