Upgrading an RL70C Plus

[bermudablue]

Hello
I currently have a 2003 RL70C Plus Pathfinder unit and a DSM 250 Digital Sounder Module connected to a M260 In Hull Transducer.
I want to upgrade the RL70C but to continue with the existing DSM Digital Sounder Module and current In Hull Transducer, if at all possible. I use the unit mostly as a depth sounder, but I also have the C Map NT+ for Bermuda in it.

Can you please advise what current Raymarine MFD units would be compatible with the existing DSM and In Hull Transducer and the best place to get it in the US?

Most of my fishing is done in 35 to 80 fathoms of water with some marlin fishing in deeper water too.

With my current set up I get good bottom readings down to 150 fathoms but the refresh rate on the screen is a little slow and sometimes when the system loses the bottom it takes a moment or two to reacquire it. The screen also has some sun damage from the years of use. I am hoping that the upgrade to the MFD will help address that.

I’d appreciate your advice.