Thanks for the great reponses everyone.
I continue to go back and forth.
I was thinking hydraulic for two reasons.
One, little or no maintenance. Mechanical seems to just get gradually worse and worse until it needs to be replaced.
Two, It looks like the motor will need to be removed to put in new mechanical cables. I had to cut one of the old ones out because of the angle from the access. I figured for the price of paying to have the new cables installed I could just upgrade.
Also, there sure seems to be a lot of people raving about hydraulic.