1: No I don't think they would be overkill.

2: Unexpectedly I found quite a difference between the chrome ring factory SE's and upgraded versions, I assume this is what you are referring to?

3: Why would the AC200 be out of date? The decoding of MQA a can be done outside of the AC200.

DSP7200's offer a greater scale compared to the DSP5200's in my auditioning experience, although both are superb speakers.

Russ