If you get seduced by the LHT lobby, be aware the current disc model is considerably different from those being discussed here, it may or may not suit you, but considering the current model on the basis of reviews of the previous might be a mistake.
I have three touring bikes, not just because I'm greedy, there's also more than one type of tour and the bikes are considerably different. You can't really go wrong, buy something designed as a touring bike and it'll be fine to go touring on, many bikes not designed for it are also fine. If you do have a better idea of what you like and what you want to do with it, the chances are you'll get a better bike, you might just get lucky or it might take a few bikes to get there.