Well guys,
The Rockford amp didn't work out. It had a popping sound any time I turned a switch on or off and a bad whine with the blower motor running, no alternator whine. Roswell amp had no popping or whine. I troubleshot it for weeks, I think it was just a weird impedance issue with my stereo's RCA's. I ended up swapping to an ARC Audio KS300.4 for the in boats and downfires. I had to rearrange my amp rack and do a bunch of swapping around, to make the wiring work (I didn't have anymore power and ground 4ga). I should be done with all the moving around and rewiring tonight and post more pictures. Shout out to Scream Marine for working with me on troubleshooting and swapping amps out. I think the ARC sounds better also.