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Keven
Point to look out for.
You will need an interface to existing equipement such as HSI and autopilot (midwest makes one). Think that adds about 1k to the price of an installed certified unit.
The 430 has the switching built in if i am not mistaken which makes the 430 1k$ less <G>.
Resale you will get ur money out of the 430, not the case for the others.
cost of updating database is serious consideration including length of support and amount of data available for approaches.
If this is the case i would chose between king 89/90b or the 430. again add the interface and wiring costs. I figured it cost me 2k to get the 90b certified for enroute and approach, however, glad i did.
bob
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