Wow that would intimidate me! I could probably be OK on judging craftsmanship, but the artistic side would really throw me! I would probably love them all! There have been many threads on this board as to what judges look for so you would probably want to do a search. Here are a couple to start you off:
http://www.quiltingboard.com/main-f1...ow-t48147.html .... and
http://www.quiltingboard.com/main-f1...s-t107050.html .... I know a simple check was to fold the quilt in half, first length wise then width wise to see if both edges were the same length. Good Luck!