just installed this one last week. have not used it on the water yet, but just syncing it up in the driveway it looks awesome. Going to try it out in the bay this sunday.
We got ours from http://www.gpsexplorer.com/gpsmap178c.html . there was a little waiting period, but you cant beat the price.
The 176 is a great machine. I have installed several of them and they are good. I have had one on my boat for the past year or so and I love it. I would recommend it. I think at West Marine they are like 6 or 700 I forgot. I got mine through my brother and an incredble price but he cant get then anymore.
David, the 176C is GPS only, no bottom machine features. I love mine. Remember, to have the detailed map features, you'll also need to purchase the Blue Chart Americas CD or the preprogrammed data card.
Go with the 276c, it will give you automotive navigation as it sounds like you want to attain. Drop me a PM because we sell them, I am getting one in today that is going in my truck. You will need the "Automotive Kit" to go with it that comes with a portable mount, 12V plug in with Speaker, 128 MB card and City Finder CD.
Fishdoc1-I put the 178C on my boat and some others about 2 months ago, you cant beat it. Compared to the 188c, it has better color resolution and colors, 50 more tracks and couple hundred dollars cheaper. You can also drop me a PM, if you want and you live in Houston you can come by and see one mounted. Bigwater on this board also had us put one on and he thinks its the "Cats Meow"!!