I put hydraulic steering (bought surplus) on my Boston Whaler outboard and was stunned at the improvement. So I went out and bought the wheel pump and cylinder to add it to the M, but I haven't done it yet. I plan to put hydraulic on the flybridge, since I do most of my steering from up there, and leave the cable on the inside helm. It will be a bit of a project and isn't at the top of the list...
At any rate, add me to this list of folks who think that hydraulic is worth the money.
1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida