I've been shooting Hill bows with either Dacron or skinny 450+, or skinny FF. Dacron is just plain smooth and whisper quiet, the skinny strings add FPS and are still really quiet. These bows shouldn't make a sound really. I tend to use the 450+ 6 strand with padded loops, I make my strings so I play with them a bit. When I'm building the bows I use Dacron, I can't deny how nice Dacron feels, but like the added performance as I generally shoot lighter draw weight bows, about 53# and under.
Some folks have found if they experience hand shock with Dacron, FF types of skinny strings help reduce it. I'm of the opinion that something is wrong with the shooters form or bow design, or arrow weight if there is handshock of any appreciable amount with Hill style bows.