Bigger is better! I have a tv screen and two others. I tried hummingbirds at the store. Couldn't figure them out. Same thing was said from the bird guys with lowrance.

I will say this, the HDS touch is tons easier. I have my dad using one. The HDS has a much better map feature set than the hook series. Maps are. Better than the Navionics chip. Kevin and I tested one and the standard Lowrance maps where more accurate and had way more detail. How big of a unit you want? I might be upgrading this next tournament year.