Hey Bill - you convinced me to take a much deeper look at this!
One question right off the top is how reliable VMG-to-wind and true wind speed/direction are when you are mixing and matching instrument types using NMEA. I've heard a lot of griping about these numbers being off, and seems like getting compass from one source and wind/speed from another might not help things. Think this will be a problem?
That said, given what I have already, and my display needs (analog wind, depth, water speed, compass heading, COG, SOG, bearing, distance to next - plus ability to scroll to stuff like VMG when needed), I figure the following:
Pure Tacktick - $2,380 - Buy: wind, 2 x dual displays, NMEA adapter
Pure Simrad - $1,700 - Buy: IS20 wind, graphic, combi, compass. Sell: Tacktick hull tx, dual display, hull tx, compass
Hybrid - $1,900 - Buy: IS20 wind, graphic, tacktick NMEA
Both the Tacktack & Hybrid options have me using a cheesy old NEMA depth gauge I already have to avoid buying another display.
So the hybrid and all simrad options are close enough to be a wash...at the moment I'm leaning toward the hybrid so I have the option of adding the wireless TackTick handheld unit in the future...assuming I can trust the calculated true and vmg numbers.
-dan
