I wouldn't suggest going for Wild Discus yet, as Roadmaster said they are a lot less forgiving. Given your questions regarding tank mates/ water etc, i would say your almost guaranteed to have a exceptionally expensive flop that will probably put you off having Discus in the future.
My advice would be to be find a quality local Discus supplier (Not chain stores) and buy all your Discus from one guy, not only will you get much better quality, they will be a ton cheaper. For example my local Pet shop and chain stores sell small Discus for around £40-50 quid a fish, my local specialist sells the same size but better quality for around a tenner. There can also be issues mixing strains bred from different areas ie German/Czech/Asian and i would imagine adding Wild into the mix only complicates things further which isn't something i'd recommend for someone getting the hang of things.