You are describing a common situation that I would guess most here are familiar with and one that is discussed very often. Upstream or downstream, which dictates good sound to you?
Sorry, I am not able to offer recommendations for "quickest return for your bucks". It comes down to what makes sense to you and what your ears tell you. I can only share my sequence of upgrades from approximately where you currently are.
My first leap were main loudspeaker replacements done simultanously with 2ch amp introduction/synergy. Improved digital front end was next along with cable trials/upgrades and experimentation with coupling/decoupling. Followed closely with the 2ch pre, which finally gave me untainted stereo. Next, the matching center channel gave me seamless theater sound. I continued to use my av-receiver for multi-channel processing, sats for surrounds and sub for movies only. That was it, as good as I would ever need, until...
A couple of good dealers would be helpful and lots of research will allow you to avoid many pitfalls.
Good luck to you!
Sorry, I am not able to offer recommendations for "quickest return for your bucks". It comes down to what makes sense to you and what your ears tell you. I can only share my sequence of upgrades from approximately where you currently are.
My first leap were main loudspeaker replacements done simultanously with 2ch amp introduction/synergy. Improved digital front end was next along with cable trials/upgrades and experimentation with coupling/decoupling. Followed closely with the 2ch pre, which finally gave me untainted stereo. Next, the matching center channel gave me seamless theater sound. I continued to use my av-receiver for multi-channel processing, sats for surrounds and sub for movies only. That was it, as good as I would ever need, until...
A couple of good dealers would be helpful and lots of research will allow you to avoid many pitfalls.
Good luck to you!