@jrdavisphd I think others have given good advice--your streamer is not likely to be the problem.
I would want to know what you're seeking when you say "imaging." More pinpoint focus, perhaps? I don't think real, live music sounds like that, but some audiophiles want that anyway. Are the images your system produces larger or smaller than the real instruments? Answers to those questions might yield more useful directions.
I think speakers and the room contribute a lot to imaging. I'm not familiar with your speakers. If your room is too reflective or asymmetrical, that can screw up imaging and require room treatments or different speakers for improvement.