I had some older Cannon Mag 10A electrics and decided to go with Penn manual riggers on my "new" boat. I don't fish for salmon and trout every weekend so it doesn't bother me to crank up the manuals when I'm fishing deep water. The electrics that I had were equipped with auto-stop and short stop, which are nice features. But I have Manual Penn riggers on my 16ft aluminum utility boat too, so I can buy replacement parts that will fit all of my riggers. I like the simplicity of the Penn manual riggers. They are much lighter than electrics when I remove them for non-fishing trips with the family, and no wires to worry about. Penn only made one grade of rigger, and they are all high grade. Other companies like Cannon make some light duty, medium duty, and heavy duty riggers, so do your research to make sure you are getting a high quality rigger. The Penn riggers are rated for up to a 14 pound ball. I use 10 and 12 pounders with mine.
Electrics are better if you fish a lot, but not all electrics are built the same. Do your research, maybe try a few different brands, then make your decision.
How often do you fish deep for salmon and trout? For me it's about twice a month, so I don't regret switching to the Penn manual riggers, especially since I have them on both of my boats.