Definitely the px. The nx is a lower end binding. It does not have the dildo heal piece which really holds you in good. I'm not sure if there are any problems with the nx series but the px is definitely better for your weight. You can g=find px12's for around $100.
Bonzai_Warrior "haha holy shit dood...shes def. showing how many fingers she uses to play with herself"
dirty_dreb: um, auclair rode for oakley. why do you think he is in session 1421 or whatveer