When do you need the impact driver / what do you use it for? I use the drill for all my screwing etc :-)
Porter Cable have brought out a 20v range, but I think they are more targeted at a building site.
I have the refurbished PCL418C-2 li-ion set (Circular saw, Reciprocating saw light , drill) and it is a great set. I knocked a closet and built an ensuite using these tools. It really put them through their paces. I expected them to break before the project was over, but they are going strong(apart from the light). The battery life is amazing (with the lx and ex batteries). The only time I noticed an issue was when using the drill with a wire brush attachment cleaning an old firegrate, the motor was starting to get very hot after running non stop for 20+ minutes.
The deal above has the newer version of the drill:
Old Drill (that I currently have)
new LX batteries are about $64, to it is worth it for the batteries alone (assuming that they are new).
I think I will get this deal (for the upgraded drill, and the batteries)