One of the best ways to expand your musical horizons is to explore new musical styles, like Marakanetz says. If you are not sure of what is good in some styles, put up a thread on this forum. The people here are very knowledgeable in a wide variety of music. You may not always agree with their taste, but at least you will probably get a recommendation with good recording quality. If you get into Jazz, you will run out of money before you ever get close to getting all the albums you want. Just Miles Davis alone has something like 60 albums out. Classical music is another real deep hole. There are thousands of different compositions and performances that you can pick from. You may not think that you will like these other types of music, but it can be an acquired taste. And many of the Jazz and Classical recordings sound fantastic on a good audio system. The acoustic instruments provide an excellent venue for evaluating the accuracy of your playback equipment. You may find, as I did, that Jazz and Classical become some of your favorites. If you do this, you will never reach the end. And that doesn't even include the other ones such as folk, bluegrass, zydeco, ethnic, alternative, fusion, etc. The music is out there, you just have to try it. Happy listening.