I wanted to mention this package, just bought one myself for the wind system - sold the DST800 and combi display on Ebay.
SIMRAD IS20 Sail Pack at West Marine
Simrad is20 wind transducer and display, dst800, and second display for depth, speed and temp, all for $1000. Not a bad deal! Simrad did a great job on the wind system, the display is perfectly damped.