Welcome to the forum
Lots of boats would love to have your problem
It is worth considering that consolidating to a single
controller may give worse results depending on the quality of the controllers yo have at the moment.
For this size of array the best choices are the Outback FM 80 and the Midnite.
The Midnite is very similar to the Outback, but is newer, and has some good features like user updatable software
. The Drawback is that without an history
it is unclear if the Midnite will prove to be as reliable and durable as the Outback. Time will tell.