Cut or Bulk? Any help would be appreciated

Hey all I'm JJ, I've decided I need to do something with my body at the moment as I didn't go down from 17 st to 11st to let my body just get skinny fat and waste away. I'm wondering from the pictures provided if you could help me answer the question of if I should cut and get leaner before I add on mass or should I just go ahead. By looking at me also are any of you able to give me an estimate of my body fat? I'm 5"10/11 and hovering between 150-155lbs.

Thanks in advance people I really appreciate any guidance. http://forum.simplyshredded.com/cached/dafa4726551e656f3baf3d411b5e3671.jpg http://forum.simplyshredded.com/cached/5ab5b2599f91d70a64c6627d47f98f20.jpg http://forum.simplyshredded.com/cached/4bb792b6690166565e7db25b66b96f19.jpg http://forum.simplyshredded.com/cached/c9a277fe9cdf00df37dac2d9264f5368.jpg