Ws 650 help

Thanks in advance for the help.

I am looking into replacing my in boat speakers. I currently run 3 sets of JL XR6.5. They are a few yea old. I am pushing them with a Fosgate 450/4 couple years old. I am thinking about changing to 3 sets of WS XS-650.

My question is what amp do you or would you run for this set up?

I currently am runnig the 450/4 for the inboat speakers. A JL 500/1 for 2 JL 12w3 and a JL M6450 for my 6 tower cans.

Any help would be great.