Who's our resident Depth Finder/Fish Finder/Chart Plotter expert?

I need help comparing new features. Remember I'm a simple guy that primarily needs to see three things:
1. bottom depth
2. bottom composition (hard or soft)
3. baitfish

Of course it's always nice to see fish on the finder and I'm excited about being able to have a map where I can mark spots on the device. On that note please interject preference for map platforms - what you like or don't. Any advice is so very much appreciated!

Thank you