Ok... I'm tossing between three impact wrenches.
the Ingersoll Rand 2135 QTiMax
http://www.automotivetoolsonline.com/Ingersoll-Rand-IR-2135QTIMAX-12-Quiet-Impact-Wrench_p_11172.html#
The aircat Nitrocat 1200K
http://www.amazon.com/dp/B002Q8A98M/?tag=atomicindus08-20
The Sunex 4345...