Big_Slab,
I have a Lowrance 334ic unit. It is a very nice unit. It is the same as the 332c only the 334 has an internal antennae. I heard a lot of negatives about the internal units not locking on or dropping sattelites. I have not had any issues in that regard. When it came down to it I just didn't want to cut a hole in my new boat.
The maps that come with these units do not have the depth contours for the lakes so you can expect to buy a map cartridge for the unit if you want the details. I was able to get some maps for my area so I haven't invested in a cartridge yet. The GPS is pretty accurate but not perfect. I like being able to download my trails and waypoint to the cartridge and then load it on my pc and go back over several trips and plan my next trip.
One downside is the documentation for the unit. The book is very thick and unless you like reading manuals well you know. I had my unit for several months and went to a seminar where a Lowrance rep was demoing units, I learned several yhings about my uit that day that frankly I don't think I could have found in the book. On the plus side they have emulators for all their units that you can download to your pc ans try them out before you buy.
Good luck.