As someone mentioned here already. Be careful researching Discus on the net. I read so many forums and opinions on keeping Discus on the net it almost made me not want to try discus. If you do enough research on the net, you'll find a lot of " I'm right, the whole world is wrong" Discus breeders and keepers. Thats not to say by any means that there are'nt passionate Discus keepers out there. You just have to wade through a bunch of boguss.
The best advice I can give you is, keep your research to a small group of knowledgeable keepers. Perhaps get a couple of books from a few established authors on Discuss. Try trolling some of the Discuss forms untill you find a few people posting that don't have thier heads buried in substrate.
Discus are a great fish to keep. It just takes a basic understanding of them, as well as, time and devotion from thier keepers to meet those needs.