I ride an older pair of sights and they are slightly on the stiffer side. I would say they are a little more all mt oriented because of the flex and the direction shape but you could still have a great time in the park. From what I heard, the punx seem playful. Don't know much on the walls. As for size go with the 169's. K2 skis run long and a 169 actually measures out to 173-175.
Volkl walls are AMAZING, ive skied many many skis and i got the 2014 walls and they are by far the most lively poppy ski I have skied. They are flexy from the tip and tail down a little bit and then stiffen up perfectly for when you're hitting big jumps etc. They are volkls stiffest park ski but let me tell you they are amazing and you wont be dissapointed
Love my 2014 Walls, not really that stiff, super fun ski. However Volkl runs short, I would go for the 185 if i was you, I got the 177's (I'm 5'6) and I measured them up as 174.
I can only speak for the sights. Im on my third season with them. Still in good condition. Just some edge cracks, but that's what you need to expect when hitting rails. Bases can take anything, topsheets chip a little easily tho.