KISS (Keep it simple, stupid) vs. Light Weight.
It seems as though the swapping out the A2 carry handle, stock, and hand gaurds void the "Simple" factor of your new purchase.
I would add a light and sling and be done with it. I love the ruggedness and simplicity of a "slick" carbine.
Just a "if it where mine" opinion. Whatever you decide, congratulations on your new purchase.