Compare similar tools with respect to what you get in their voltage class when you look at the higher costs. The higher priced tools have high amp batteries and usually come with 30 minute chargers and of course storage cases (but not that that really matters so much).
Look very closely at rpm speed and torque. Some manufacturers offer various configurations of torque and rpm within a tool class and I think that may account for differing opinions of performance with similar tools. Like it has already been pointed out in this thread screw head design is major factor in driving screws without slip or chatter or stripping. And of course the impactors will enhance driving ability.
And overall total tool weight isn't that critical a factor to me anyways. A half a lb difference either way on the big boys isn't a real deal breaker. If you really want lightweight go with latest 12v offerings or models they now refer to as subcompacts.
A lot of a tools design centers around ergonomics the fit and feel, especially good if your using tools often. Most all offer the choice to buy a "bare tool" once you have the battery/charger kits and with the big names that bare tool is sometimes only 1/3 of the original investment which is a pretty good deal .
Now for my tool reviews
I needed to replace a Makita 9.6V I had for what seemed forever. It was the type with the built in battery and before keyless. One day it just started smoking on the charger, fried and went dead. So when I went drill shopping I picked up a
2462-22 Milwaukee 12v impact to use around the garage for now. It easily knocked off lawnmower head bolts the first time I tried it and it will bury a 3 1/2 screw full depth into a pine board quick as can be. But not so powerful as to strip out smaller screws before you realize it. It will strip out low grade 1/4 inch bolt threads if you try. At the current price offering I think its a very cool deal and has a higher torque rating than the previous
2450-22 which by the way has been on sale with a hex screwdriver and case all for
$99.00. I first thought I would get the
Makita 12v combo. It was also $99.00 for two tools and some reviews claimed it wasn't powerful but the real deciding factor as it been mentioned in this thread was in the hand. The Milwaukee just feels so right! I'm hooked on these little guys!
Eventually I do plan to add the
LXT218 combo kit to my work arsenal for up at the orchard and going around on jobs with my GC buddy.
Hey how come nobody is stepping up with any Harbor Freight yet?