Hey guys, thanks for your input. Good info.
Fishingfiend, I have been watching Doug Vahrenberg's videos on youtube
Very educational and convinced me to go with a Humminbird unit.
http://www.youtube.com/user/imonbass?feature=mhee
Good to know about the depth penetration with the different transducers
Kayak wise, most of my angling will be inshore.
Going with this unit: (597 ci HD DI)
http://store.humminbird.com/products...9220796a9b96d4