That's right, this is the best place in Durham to make a sign.
My mom got a 10 letter 2 color sign done for her Mexican store in Louisburg, NC. Their service was great, they took care of licensing (yes, you need a license to put up a sign! I didn't know that) and brought the sign from their shop to our store forty five minutes away.
The price was reasonable but it also depends on what you're looking for.
McCorkle did a great job and I recommend them to anyone who wants a large commercial sign.