If you are trying to make something bullet proof, I am totally for it!!!! I would love to but to actually make it nice, it will cost around 10-20 K.
I think a nice alternative would be to make the under gel. What you should do is first get a mold of your body. Then, make like a 1 inch thick gel (harder than jello, stays in a certain formation, like a soft rubber) and then put STF (shear thickening fluid) coated kevlar on that. Then, this would stop bullets with the stf over it, and make it not hurt as the bullet stops, and it would be very light. Then, since you want a halo looking suit, make a metal helmet (Titanium) and have ceramic (ballistics proof) plates in the masterchief armor formation, over all of it. Work out the kinks and it should work.