First off you never mention what type of sound you like and what type of music. So all the recommendations here IMO mean nothing until I understand what you prefer. I understand the room treatment thing but again what size is your room. We have a Listening Room with brick walls and practically no room treatment. I would bet that we achieve better sound than most people making recommendations here. Source is important, speakers and then the amplifier. You cannot get there by most recommendations mentioned here IMO again. We have more speakers, and components in our Listening Room than most people posting here have heard in their lifetime. There is so much that goes into sound. But unless I understand what you like, I cannot recommend anything to you. We manufacture our own line of audio components that can be build to your ears. So help us understand what you like. You can spend $20K and get poor sound also.
Happy Listening.