Well, I kinda went overboard with the upgrade!
Fact is, I had been wanting to switch to Humminbird for a long time now, though I've been a Lowrance user for years. But I've been out on too many guide boats and friend boats with Humminbirds on them and envied the optics and the layouts.
So I ordered the Ultrex with Mega SI+DI, and am replacing the HDS9's on bow and console with two Helix 10's, and linking them with ethernet. South Austin Marine is doing the install.
There's gonna be a learning curve in store for me I think.