Just my opinion but if I'm am going to run 32# copper I mode as well run lead. The hole point of running copper is to run less line and get down deeper. I run lead and 45# copper and slowly switching all of my long lines to 45# make it easier to run more lines.
I would lever trade my fish hawk for any thing. I can use one set of batteries, and if I'm searching for a certan temp it has a fast response time. I have to worry about to many other things to have to worry about a cable going to my probe.
I used to run 4 riggers and would wash a lot of baits, droped down to 2 and added 2 wire divers and could not keep all 4 rode in the water most of the year.
I use my gps speed only when my fishhawk is out of the water because it is way more accurate than the fishhawk surface speed which is based on a paddle wheel and gps is off from satellite
I found my fishhawk 4x online for around $540 plus shipping and have loved it no problems, I have been using the same set of batteries that I started with last year just turn it on hook it up and read the speed/temp easy as cake