Mark, I don't think anyone's upset with you, it's just easy to see that in a written word. There's no tone of voice to listen to. I think your question was a good one.
Many LFS's are good and respectable. Many more are not. You've heard from a lot of people that have had bad experiences and you have been given the logical reasons why discus and LFS don't traditionally mix. (no tone here ;D )
If you trust your own LFS, go for it. You said you can rely upon your LFS if there's a probelm? Maybe that's so and that's great. That's also not the case with all LFS's. When I mentioned the terrible discus for sale at rediculous prices near my home, the main thing that caught my eye was the fact that every fish they sell comes with a 3 week guarantee. Every fish EXCEPT discus. Once a discus is paid for they wash their hands of any further responsibility. By the looks of their fish, I would not expect them to make it more than a few weeks. Absolutley terrible!
Good luck in your purchase no matter who you end up doing business with...
Brian