Sorry it took me so long to respond... Being from Cali, I don't frequent the Kansas forum too often.
Anyway, I bought my tow bar through a local muffler shop / trailer repair place that I know the owner of. If you're not sure what you are doing, I would seek out the advice of an expert at a RV place or somewhere that sells trailer hitches.
I choose the Sterling bar based on weight and ease of use. Like I said before, it is exceptionally easy to use. You don't have to line up perfectly to hook-up, you just need to get close. I have a friend that uses a cheeper tow bar that mounts permanently to the jeep. It often takes him a half an hour to get hooked-up and ready to roll. Never takes me more than a minute or two and I can do it myself. No need for a spotter to help get ligned up. You don't know how nice this is until you've done it in the rain.
Here is a Link
for etrailer.com. They have good prices and provide a lot of good information.
If you have any more questions, PM me.