I am currently looking at the same bikes, 2013 P2 for $2000 or a new 2015 P2 for $2800. The LBS I was in the other day swayed me from the 2013, saying the new P2 has a longer head tube thus providing better comfort for someone like me (50 yrs old, 6'2" and around 225). I was having a hard time telling if I was being swayed for $ or fit. I understand the P2 frame has changed a fair amount since 2014 and on, but it seems the old P2 design was very successful and had a long run. I have searched around extensively and many say without a consideration get the new frame. The $800 saved on the 2013 could go a long way towards wheels or other needs. What do you guys think? Any opinions much appreciated.