I agree with @vthokie83 (above). It sounds like the most immediate concern might be the lack of a dedicated, wired streamer. You should be able to get a very good streamer for well under $5K. Even a Bluesound Node, or a Holo Red (if you can get it), might be a good upgrade for less than $1K USD. Try that and see if you aren't more satisfied with the speakers and integrated amp you already have.