Gps: Need Help

Gonna order a GPS in the near future. Is anyone familiar with either the Lowrance 3600C iGPS or the Garmin 172C? I've been looking at different units for quite some time now and both these seem to have what i'm looking for. I have locators on the console and trolling motor so i don't need a combo unit. I've also looked at the handheld models, but think i'll go with a full size since it will only be used on the boat and i like the larger screen. Set myself a limit of 700 bucks. Any suggestions on these or other models...izzy

Izzy..I run a Lowrance LMS-334c and I am very well pleased I think the 3600's is GPS only no sonar, if you do alot of structure marking like we do I think you will be satified with it. I like the color feature of mine I had always had a black and white screen now if im not carefull all i want to do is play....