Wouldn't mind the cordless and willing to part with a few $$. I'm just concerned with the longevity of the battery. What is the typical shelf life of the Li battery. Replacements are expensive. Also wanted to make sure it can handle the heavier torque.
Do you have a single brand of cordless tools now? If so, look for a "tool only" for that brand, preferably from Amazon so you can return it easily if it doesn't work.
The Milwaukee impact I linked to in a tool only kit is less then half cost of the tool, batteries and charger kit.
Going on 4+ years with my first pair of Milwaukee Lith batteries.
As far as the coins go, you'll get what you pay for. And although the Ingersoll looks pretty good for the price, the 1100 ft lbs claim seems to be a stretch.
The problem with one off $400+ dollar tools is they sit way more then ever get used, which makes it harder to justify the price for the tool kit and the replacement batteries.