I would go with perlick faucets as you indicated. I have the old style with the removable spouts. I don't take them apart very often.
The 525SS looks to be the way to go.
The 575SS has a creamer function.
You need more gas and liquid connectors. Any manifold will work but I suggest you get one with check valves in the supply valves.
A lot of people use 3/16" ID hose on 1/4" shanks. Heat to get them on. 6' of hose at around 10psi @ mid thirties works on my system. I have subsequently gone with resistance inserts to shorten the spaghetti in my chest freezer.
Go with all stainless shanks, hose barb and faucets. The gear type clamps are fine. Oetiker clamps are cleaner looking and you are less likely to cut your hand on the clamps.