3/8 impact driver or wrench?

[brickyard69]

I am looking to purchase a cordless impact to aid me in my new project (69 Camaro of course).

I see the drivers advertised more than the wrenches. Does anyone have any suggestions (brands, styles, etc...).

I already have a 18v drill ans air tools. I want something lighter, more powerful, and don't have to fire up compressor at night.

Thanks for the input.