Clarke, I understand your thoughts on cordless tools & if you don't want to change your mind, DO NOT use a 18v cordless impact driver (for running screws). So far, everyone that has used mine has bought one for themselves. It replaced my air nailers as the most fun tool I own. (BTW, the port-a-band & mig welder are always in the top 5.)
I got a 18v impact driver as part of a set from Makita. It has a 1/4" hex connector so it is really only for screws. I almost sold it when I got the set as I thought I would never use it.
I'm glad I didn't sell as it is the most used tool in the set. I think I used the drill once or twice, but the impact driver all the time. I think it may be lighter than my 12v drill. It is really handy for removing screws on the bus. (I'm not ready to put any screws in quite yet.)
Brian Elfert