OK I see He answered.
After a brief period of using a 7' spinner to throw some small jigs, I was given a demonstration of what
the long rod can do.
It didn't take any further discussion, the demonstration was clear.
Go Big or Go Home. If you want to throw big jigs like the 7x, or Heavier, you will need a 25-60, 30-50, 30-60 rod. Preferably 9ft. I do also have an 8' 6" Shimano Calcutta that I like very much as well.
I like a jig stick with a stiff tip, but this is going to be a personal preference area. In addition to the retailers that Josh mentioned I will also suggest going to Angler's Choice. They have a large selection of jig sticks in a variety of weights.
The rods I have been using "daily" for the last few weeks are a Phenix Black Diamond PSW909 XH 25-60 9ft. and a Shimano Calcutta 30-50 XH 8'6"
Both are composite (another personal choice) light, stiff, and strong.
Good Luck with your shopping, and take your time selecting a good one they are not cheap.
-Here is some verbiage on the long rod, I hope it will help shed some light.
http://fish.shimano.com/publish/cont.../rods/0/0.html
-I recently installed a cork puppy on both sticks to displace the reel clamp pressure, and for additional holding power.