I'm curious if anyone has any experience with a "value line" GPS and sonar combo. I would like a nice big touchscreen unit. But for now I can only afford to go with something 700 or less. I know waiting and getting the right thing the first time is ideal. But in this case the boat only has an ancient depth finder. So I would like to get a new one with GPS. Just to get me started. I'm thinking lowrance or garmin but I'd like to hear any first hand experience before I choose. And I prefer combo because of space for screens. Thanks and any advice and opinions are appreciated.