Hola Jfoe,
I just barely did this same dance myself. My end decision, go talk to Eric at Marine Aquatics. You'll get a good price, excellent quality stuff and he'll be able to give you some REALLY good suggestions on setting up your canopy. I just finished mine and his stuff is top notch and not much more than the cheap 2nd rate stuff online.
Look up Marine Aquatics under "Local Pet Stores" on the left.