We went ahead and pulled all the RCAs and ran them like this:
Front R/L from HU to Kicker amp and then from Kicker amp to Alpine amp
Rear/Sub R/L from HU to splitter and then into Rear R/L and Sub inputs of the Alpine amp
In doing this we eliminated 2 splitters and 1 RCA cable from the way it was set up before so that should eliminate any lose RCA connections (we know that we had a few before). I know we don't have independent control of the the tower speakers but we haven't ever had it so it's not something that we will miss - that being said our next boat will have independent tower volume control
We're headed to the lake for the weekend so I will report back on if we had any noise issues or not and if we do I'll make sure to note what kind of noise and if it is impacted by the engine RPMs or not - anything else I should note if we have any noise?