I prefer longer rods for Bluegill and Crappie fishing. I try to look for 8'0 or 8'6" rod while bluegill or crappie fishing. St. Croix makes a good panfish series. I tend to go with the light action rods.
The longer rod really helps with casting if you are fishing deep with a bobber or with light line. I prefer to finesse fish while fishing panfish. This means very light line and subtle presentations.
Also, the longer rod is a blast while fighting quality panfish and a good bluegill can feel like a freight train!
http://www.stcroixrods.com/product/panfish-series
The 8' and 9' selection would be great choices.