which gps/plotter is best bang for size
 

I have a little 27 in restoring
made it to electrics stage
wanting a good small gps as want to flush mount with limited room
been looking at the garmins
echo50,431s,441s,541s,
all are same size screen and approx. funtions
like the nmea2000 capabilities
as would be cool to use the fusion radio to link to

so which is best bang for smaller size
or another brand to check out

Raymarine a75 looks like a good reasonable piece. I'll be installing one soon for someone.

I just got a lowrance for $313