Personally I'd stay away from cordless drills. Everyone I've owned sucks. I've owned/worked with 14v and 12v's from different manufacturer's. With in a year or two the batteries quit holding a charge or the charger stops or the dang drill just doesn't have enough power. I had a craftsman corded drill that was 20+ years old before it finally quit running. Right now I'm running a dewalt corded drill and have drilled numerous holes in my frame, wood, metal, bushings, yards, concrete, ETC and it's still going strong. I'll never buy another cordless drill again.

 

I've also abandoned cordless, though they ARE extremely convenient.

I've decided that having a tough tool that actually lasts is a LOT more convenient than gong cordless.

That said, I'd consider cordless but ONLY if the system uses Lithium-ion batteries. This is the same battery tech in cell phones and Ipods and such. Far superior to NiCad and Nickel metal Hydride batteries.

That narrows it down to the new Milwaukees and the Makitas with the Lithium batteries. Either would be a great choice. they are probably the only cordless tools that really are close to a true corded replacement. They are quite expensive though.