IMO a Brazil valve/external ram setup is a better way to go, trying to stabilize the drive using the tiller just don't work. With a Brazil valve setup you will have the coin to use an external ram, another plus is the feel of the steering stays stock. With hydraulic helm you work twice as hard around the docks, I am sure you have noticed after completion of full hydraulic first comment handling around the docks suck!
No matter what your beliefs are "GOD BLESS AMERICA"
Fully retired marine tech near 60 years in the biz.