I will happily recommend the Snap-On cordless stuff. I've tried a few different brands and nothing else even comes close.
The second-best one I've found was the Chicago Pneumatic cordless, rated higher than the Snap On and it even cost more when it was new (yes more than $900) but in terms of power and battery life it pales in comparison.
If you use the Snap-on gun flat out every day it will last about 1.5-2 years. Batteries last a bit longer, maybe 3 years. Usually the first parts to let go are the hammer mechanism in the nose of the gun, and the trigger switch.
If you only used it occasionally at home then it would last for ages!
We also have the cordless drill at work and it's very good. I used it to enlarge the holes in my steeering knuckles with a huge drill bit and it didn't break a sweat.
I think I said this before on the old forum but i wouldn't even look at anything that costs less than $800 becasue I can pretty much guarantee that it won't be as good. But then you probably don't need something that good for working around the home...