If you've got 5 good wires coming down the
mast you can use them for your wind.
I recommend getting a
Raymarine ITC 5 converter. It will take input from most older
instruments and devices -wind, depth, autopilots, etc and convert the signals to
NMEA 2000 data.
This allows you to use any of the modern displays, both B&G,
Simrad,
Garmin and
Raymarine to display data. A Raymarine i70 display can be set up to display depth, position, wind angles, speed, etc. and switched around on the fly.