I bought the poly bushings that HD shows on their website. When I was talking to the guy doing the install he said better bushing weren't needed like they used to be and that I could have stayed with the stock bushings. He stated the stock bushings are made a lot better than they used to be and I had a new bike. I already purchased them so I had him put them on anyway. Better safe then sorry since I had already spent so much on cables and bars.
OE bushings are fine, we always sell the super clamp whenever we do a bar job. Helps greatly reduce the risk of the bars rotating since there's more leverage on them.
On my 2008 I went with poly bushings and it was definitely a good change. With my 2011 though, they seemed quite stiff already even with my new bars (10") so I saw no need. PO's records don't show the bushings having ever been changed.