Well, I have my doubts about LLL just from some of the things I've seen on their site, and I've heard some pretty nasty things about rodentpro. Pro Exotics, now I've got respect for them as snake breeders, and I know it's good to show confidence in the reptiles you produce, but those guys are just arrogant and it turns me off as a potential customer. That's up to you though.
I buy my snakes and heat tape from "within the biz." If you can find other supplies at Lowe's or wherever for a better price, which you often can, go for it. It's economics, and if people who specialize in reptile supplies aren't going to bend, it's their loss.