Hello and welcome!
I'll cut right to the chase: Sell your A10 and buy a
Tascam DR-100 mkIII. This will give you much better preamps, a better ADC, a set of safety tracks to use instead of limiters, and put everything you need into one small package without needing external power.
After making that switch, your recorder will likely not need an upgrade unless you want to record more than 2 channels. Until then, the next upgrade that you will likely make is to your mics.
The DR-100 mkIII is discontinued, so if you can't get it at the Amazon link above, you could buy a Tascam DR40X or Zoom H5 instead. The DR-1000 mkIII is definitely my first recommendation though, for the higher-level preamps and ADC.
The CA 9200 is not a solution for you, as it only gives your mics 9V power, and the type you are using will only perform their best with 48V. It also has you still using 2 boxes.