I think it is very interesting to consider what MN 106 says about "this is empty of self" contemplation.
http://www.accesstoinsight.org/tipitaka ... .than.html
"Then again, the disciple of the noble ones, having gone into the wilderness, to the root of a tree, or into an empty dwelling, considers this: 'This is empty of self or of anything pertaining to self.' Practicing & frequently abiding in this way, his mind acquires confidence in that dimension. There being full confidence, he either attains the dimension of nothingness now or else is committed to discernment. With the break-up of the body, after death, it's possible that this leading-on consciousness of his will go to the dimension of nothingness. This is declared to be the second practice conducive to the dimension of nothingness.
A few things to note in that sutta:
1) This "empty of self" contemplation leads to the dimension of nothingness. "Or else" one is committed to discernment.
2) The dimension of nothingness is within the scope of that which can be the basis of "identity."
3) The dimension of nothingness is a "perception."
So before I supposed anything to be "touching ultimate reality" I'd want to be certain I understood (in direct experiential comprehension) everything said in that sutta. This is very difficult terrain.
"When one thing is practiced & pursued, ignorance is abandoned, clear knowing arises, the conceit 'I am' is abandoned, latent tendencies are uprooted, fetters are abandoned. Which one thing? Mindfulness immersed in the body." -AN 1.230