Go for the coolest thing of the armor, the helmet of course!
I have AP and loved putting it together....
Some differences between stunt and hero are the eyes....stunt has flat lenses while hero have bubble eyes. Also, the number of teeth. Yours has the number for stunt. another difference is number of rivets holding the holster to the belt. Hero has four, stunt has two.
I'd recommend starting of with the helmet but start where you feel most comfortable. I did the helmet and the worked from the shins on up.
Just take your time, test fit everything. I would suggest E6000 glue. Strong but allows you to easily take pieces apart for adjustments.....since you are planning on going for advanced tactics, you will need to replace the mic tips with more accurate hovi mic tips. You can find some in the on going sales section. Also replace he lenses you got with darker lenses. Also paint the gray traps on the helmet or you can get decals, I think they are called DaveM decals from trooperbay.com
Good luck....we're all here to help....