First of all, you are not that specific to get good responses. Why is $20K your budget? Equipment you will be using? Many responses here are form people who don't really know that much meaning they have comments that are general and have not had the opportunity to match things together. For example, Sonus Farber are not for rock. Please come to our listening room in NJ and we can demonstrate what they can do. Some of the other generalizations we can also demonstrate with other opinions. While many people have gone to a dealer or audio show, they have not really heard what proper equipment matching can offer because they have not had enough time hearing things in their own systems and with so many different components. So while there are some good suggestions, some are generalizations.
Sorry folks, it is simply the truth.
Happy Listening.