Why not a Street Pilot III Deluxe?
Daver, I have a perfectly good Garmin Street Pilot III Deluxe with lots of extras like Kennedy power harness and device harness, sunshade, 256mb memory card, carrying case, cradle and RAM circular ball plate, AC adapter, Dynex serial adapter, MapSource Version 8 and all the bells and whistles that came with it (bean bag dash mount, 12V adapter cable with external speaker, USB data card programmer, 128mb data card, pc interface, original owners manual, quick reference guide, setup guide) all in excellent condition and in the original box that I will sell you for about twice as much as the 250C. I have a Street Pilot 2720 coming on Tuesday to replace it, my "to me, from me Christmas gift". The SPIII will work very well on your Wing .. Sue