I'm going to stretch a bit, but based on my experience, I believe you are missing the Anedio and NuForce combination.
You could try finding another Anedio (or try buying it back) and using that with the LS50's analog inputs, but you'd still be using the LS50's class-D and class A/B internal amplifiers instead of the NuForce.
It might be best to categorize this as a learning experience and sunk costs. Otherwise trying to change the sound back to something close to what you like will involve experimentation which could get costly.
You could try finding another Anedio (or try buying it back) and using that with the LS50's analog inputs, but you'd still be using the LS50's class-D and class A/B internal amplifiers instead of the NuForce.
It might be best to categorize this as a learning experience and sunk costs. Otherwise trying to change the sound back to something close to what you like will involve experimentation which could get costly.