SARX vs PNEUMA

Let's talk about SARX vs PNEUMA.

Paul penned:

Galatians 5:17 For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.

"flesh" (SARX) v "Spirit" (PNEUMA). Is this an accurate rendering?

What about these?

New International Version (©1984)
For the sinful nature desires what is contrary to the Spirit, and the Spirit what is contrary to the sinful nature. They are in conflict with each other, so that you do not do what you want.

New Living Translation (©2007)
The sinful nature wants to do evil, which is just the opposite of what the Spirit wants. And the Spirit gives us desires that are the opposite of what the sinful nature desires. These two forces are constantly fighting each other, so you are not free to carry out your good intentions.

Is Paul discussing "flesh" or "sinful nature"?

"sinful nature" is ostensibly an attempt to more accurately render SARX, which, we are to understand, is actually a technical term which is more properly rendered "sinful nature."

I consider this a case where the translators were not correct. (I also hold that PNEUMA is "breath" not "Spirit").

I consider this modern practice sooooo far off that it masks a profound lack of insight into Paul's views. What is the correct view?

Paul's writings hinge almost entirely on Genesis 2:7:

Genesis 2:7 And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.

Man is dirt+breath. Paul refers to man as "flesh+breath" (mistranslated as "sinful nature...Spirit").

His perspective is that the clay/flesh of a person is where sin lives. He calls the body "this body of death."

The unbeliever breathes and is motivated by the air that is from the ruler of this world:

Ephesians 2:2 Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air [of] the spirit [air] that now worketh in the children of disobedience:

So the sinner is "bad air" in "bad clay [flesh]" while the believer has "holy breath" in "bad clay [flesh]."

This should serve as a cautionary tale for those who want to disconnect too far from scriptural terms.