Basspro and Cabela's were running a deal on Lowrance Elite 9 TI's earlier this spring for less than $600. My cabela's still had some two week's ago.My understanding of the main difference between the TI and TI2 was that the TI2 did wireless sharing between 2 TI2's. I was planning to get a Humminbird but could not pass up the deal. Has traditional sonar, chirp, downscan, side scan, and came with a Navionics chip and transducer. Also is touchscreen.