The Sony is 15 years old. DACs have come a long way. If you use this for theater, you really need 3 matching front speakers. The Mirage or HPM can be saved for rears. Your Carver could work fine depending on the speakers. Also many pre-pro's won't have phono built in.
1-what is your budget
2-what will you use most theater or 2 channel?
1-what is your budget
2-what will you use most theater or 2 channel?