I have seen many discussions on this issue but everyone has a specific way to fish which in my minds dictates what you buy. The wife has given me the green light to buy which is the most importnat thing.
I will buy two units and connect them together.

1. One will be at the console which needs SI, DI and GPS with internal antena. I want at least 8" screen. The transducer for this unit would be on the transom.
2. The other will be on the front of the boat. I need DI, GPS with at with a 5" screen ok but prefer 7". I need internal antena and the transducer on the trolling moter for spider rigging.
3. I want them linked if possible
4. Would like to stay below $3500

I have always been a Lowrance man but willing to change. Your advise is greatly appreciated as it is very confusing when you start shopping