I purchased a Mayfair hydraulic system, full from helm back for dual Bravos a few years ago from Hardin in FL. I thought the Mayfair was the best bang for the buck. All the items are excellent quality. The machining detail & finish on the column provides a nice bling for the helm. System was very complete with all external braided stainless hoses, filter, fittings, bulk internal hose, reservoir, etc. The documentation was very good, and Jeff at Hardin was excellent to deal with.

Some things to consider:
a) Not all systems include the external reservoir.
b) All systems basically use the same Eaton helm units, but CC displacement varies.
c) Different manufacturers use different fitting materials & finishes
d) Not all manufacturers use a backing plates inside the transom, they only use fender washers.
e) If dual Bravo set-up, do you plan on using a single pump or dual pumps. The dual pumps require a different plumping & priority valve arrangement.