Currently thinking that i'll go with something pretty basic, rather than the modern colour sophisticated systems available as i can repeat all NMEA data on the plotter anyway...
Favourites at present are Advansea... I can get a complete set of three displays with all senders for £649!
That compares with £1200 for Raymarine or £800 for a Garmin system with just one display!
So, it'll be a busy time when she's lifted with (I think) 8 seacocks to fit below the waterline, and 4 above it, new senders, and all the holes to refill/resize with epoxy.
I'll also need to antifoul and redo the boot topping while i'm at it... Phew!