Boots, Chris, thanks for that little bit of history. I was unaware of the MC connection.
About the pistons;
There seem to be a number of NOS MC pistons around, and I am sure that V-Twin added the coating. The coating will help quiet the pistons down, but be sure you give them enough clearance for a forged piston.
I would stay away from the Keith Black because of their top ring placement. They are designed such that the top ring runs hotter than normal which makes them sensitive to extra engine heat. Something as simple as incorrect ignition timing can cause the top ring to butt together (lose all end gap) breaking the top ring land. They are high quality pistons, just unforgiving.
I would also stay away from the 9:1 compression ratio unless you are looking for more performance, and using a hot cam. Otherwise you may end up with a motor that's prone to pinging.
I don't see any pistons in the Colony catalog, but if they do sell them, it is very possible that they are the same pistons that V-Twin sells.
Almost all of the generic replacement pistons for Harleys that I have seen seem to work fine as long as they are set up with enough clearance. Here's what I'd do. Go to your local Custom Chrome dealer (or equivalent) and buy generic pistons for $28 each, add a $34 set of Hastings Moly rings, and then find a local hot rod shop to put the piston skirt coating on for maybe $40 for the pair. Just my 2 cents worth.