Humminbird 798 or solix 10 for PA14?

When I was in Korea, I used 798 for kayak and Onix for boat.
I sold the boat before moved in here but couldn't sell Onix unit since it had  SI problem.

After moved in US, I sent Onix 10 to humminbird and get back Solix 10. I had to pay more than thousand dollar though.

Anyway now I have 798 and solix10 with PA14.
Since I like autochart live feature, I would not like to use 798 anymore but solix 10 seems too big for kayak.

I think when it comes to humminbird, helix 7 is good fit with kayak.
I need to carefully consider what would be good option.