I too went through the Cannon Speed and Temp probe failures....very frustrating as it worked great went integrated with Cannonlink and Humminbird unit.....when it worked.
I now have both the Depth Raider DRx-10 and the Fish Hawk X4D, I use the Depth Raider as my primary because of faster updates (seconds vs a minute+) and deeper readings (~175ft with wet towel hack). The only time I use the X4D is when I want to know probe depth or I want to track temp simultaneous at multiple depths (the X4D will need to be the shallower probe). I have made the cable issue more manageable by loading 400ft of coated cable and replacing the last 20-30ft as needed (once a year at most). Still using the same spool from 5 years ago, and expect to get a couple more years out of it.
Your coated cable from the Cannon Speed and Temp should work with the Depth Raider. The DRx-10 can be purchased from several retailers (Tackle Haven, for about $500.