I need some Humminbird Helix advice please ..... I have an older Helix 5 DI on the bow that I need to replace so I'm thinking I'll move the Helix 7 Chirp DI from the console to the bow and get a new unit for the console. I've lusted for a side image unit for some time but I'm an old guy on a budget .... no way I can justify $700 plus price. I've spotted the now discontinued HELIX 7 CHIRP SI GPS G2 online closeout for $399.

Is the Helix 7 too small for the SI to be usable?

And I know G3 is better than G2, but is G2 junk?

Thanks in advance.