Faced with the same dilemma recently I went with Pneumatic replacement for my age-old and failed 1/2 air impact.
I purchased this:
Ingersoll Rand Air Impact Wrench — 1/2in. Drive, 4.2 CFM, 600 Ft.-Lbs. Torque, Model# 231C
..and so far have found it to be the real deal. No fake torque spec or over exaggerated claims. Just solid performance. It was on sale, if I remember right I got it for around 100 bucks in the store locally in Dallas.
https://www.northerntool.com/shop/to...ct_17802_17802
It's 115 right now on Amazon.
Hth,
-klb