You should switch.

Only way for you to tell for yourself is to get a demo. However since you have a pair of 5k2SEs it really doesn't make sense to hold them back with the AC200.

AC200 has non-asynchronous USB, a much more basic set of filters and processing. 818v3 will give you full access to MQA (OK, this is slightly limited by software availability at present) and the ability to continue the upgrade path as well as an ID41 rather than your current MS200.

The AC200 is a dead-end, as far as technology is concerned.

I do have an AC200 which feeds my 6ks. I view it as a basic switch for sources.

I also wonder whether an HD621 would be useful. Even with 2-channel you would be able to get all the hirez tracks from your blurays. Currently you're limited to core tracks only.

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.