Thanks for all the input. I overlooked the Ethernet part of the Humminbird web site. I am really liking the direct connect idea better than the interlink. Wish I had the dough to hook two 900 series together but guess I will have to strain my eyes for a few more years. The 700 series are closer to budget.

Greg, if I am running two 788ci HD DI, you said an adapter was needed for the Ethernet connection on 700 series. I am assuming two adapters (1 for each unit). Since I am running two DI units, I will be able to view the DI info on either unit regardless of which one has the transducer hooked to it. Is that right? If so, I can run one unit off the bow using the 2d sonar off the US2 on the Minn Kota V2 and the console will have the other unit & DI transducer off the transom. If I understand you correctly, I will be able to Ethernet connect the two and switch views on the bow unit to see the DI info off the transom transducer. Correct?

I hope so. It is sounding like the best option for me right now money wise.