No side imaging on that unit would be my guess, or the fact that they are a little late to the party in the freshwater scene. That being said, I just replaced a HDS 8 with a Axiom 9 w/3D and am impressed with it so far. Easy to operate and lots of features for the price.
Right, but the Helix 7 with Chirp and DI is $500 without a navionics chip. No SI on that either. Most of the SI units are around $700.
I guess you might be right. Seems like most people just don't know much about them.