I have a 1198 on console and a 1199 on bow. I'm looking at the sale prices of the G1 Helix units and thinking about getting a 12 for my console. Questions: Is the Helix G1 SI a big improvement over the 1198? Is there $1k dollar difference in the G1 and G2 Helix 12's? Can the G1 Helix and my 1199 share info...waypoints?