finally decided on a boat now i need help choosing the electronics. i like the hd7 touch and think i would put it on the bow. my query is what unit to put on the console. i want them to comunicate with each other and be able to see pretty much the same thing on both. should i get 2 of the sevens? another thing i was thinking of is upgradig to the 10 and putting a gimble mount on the console. any suggestions or ideas?

Simply put, you need to purchase the largest units you can afford. I've never encountered anyone that regretted buying a bigger screen. I've been running the Touch units for nearly 6 months and they perform great. The Touch 7 is available now, and the Touch 9 and 12 should be before the end of the year. For networking/communicating, just be sure both units are in the HDS series (either Touch, Gen1, or Gen2), then Ethernet-link them.

should i run 2 transducers? 1 in the hull and 1 up front on trolling motor?

yes, this way when your running your trolling motor you know exactly what youre seeing is below you.

Personally, I'd want the bigger display up front, since I'd be looking at that most.