Our pick of the cordless drills around today is the Dewalt XR 20-Volt Max Brushless Compact Lithium-Ion compact drill/driver kit. If you want something more reasonably priced, go for its little brother in the Xtreme 12V Max model. It's just as good, if lacking slightly on the power front.
Those on a budget have numerous good options but our favorite is the Black+Decker 20V MAX Cordless Drill.