Construction + beautiful top sheet. Worth the ~$100 in my opinion.
I think a 164 might be too long for you, doesn't seem like much fun. I'd go with the 161.5 for sure
I rode a TRS 2010 model few days back, which was not really short for me, but I though, those 2 cm might do better for me.
I read here, that a HP seems to have more flex and is not that stiff as the regular one is (7/7 according lib tech). I think, stiffer board might be better for me. Any input on this ?