Go to
www.candlepowerforums.com home of the flashlight, LED, and Laser geeks. Don't search for "AJ Dual", please, I'm not there. Really&
There is a sub-forum that should cover LED light bulbs, which are "best". If searching does not come up with what you want, register, post and they should be able to help you with some good vendors and product recommendations.
A "Good" LED bulb that has sufficient lumen output, and a good color-balance to compete with CCFL's and Incandescent won't be cheap, but they're already awesome for non-critical maintenance lighting like basements and garages, accent lighting, like under cabinets and in moldings for effect lighting.
The good news is that LED's have a semiconductor economy, that they'll get exponentially cheaper as demand rises. And they do last for hundreds of thousands of hours if driven properly. Some of the high-end emitters are within spitting distance of achieving 100 lumens per Watt, which would be something like 60-75% efficiency, and they'll cost pennies apiece.
Right now the state of the art in high-end flashlights and such is about 40% efficient, but that's still HUGE, as compared to approximately 5% efficiency for incandescent.