Welcome to the board and congrats on your new Wing. I'm about the same height as you and I installed a set of Kuryakyn ISO pegs on my 09. I don't have a backrest but a lot of folks have Uthopia, Kuryakyn or Markland rests on their bikes. The last 2 have metal bars that attach to the seat handles which can be intrusive to passengers, but the Uthopia has to be connected directly to the seat. It's a little more involved and requires cuttingthe seat and installing a bracket on the underside of the seat, so if your uneasy about cutting the seat you would need to have a dealer install it or choose a different backrest. The installation also become a little more difficult with the 09's since they have the heated seats.
Hope you find the right one for you.