With LED bulbs, don't pay attention to the wording. One vendor's "warm white" and another's might be quite different. The three numbers that matter are color temperature, color quality, and lumens.

Yee olde halogen bulbs are 2700K and 100CRI. More on lumens in a moment.

The higher the color temperature, the more blue the bulb. 2700K is obviously desirable but costs more than 3000K. Similarly, the lower the CRI, the more jagged the color spectrum of the light. This manifests itself in textiles appearing weird colors, since the color dyes are typically selected for halogen or daylight conditions. A CRI of 80 or more seems to be acceptable. Very expensive LED bulbs are in the mid 90's.

Lumens turns out to be annoyingly complex, and phrases like "60W-equivalent" are often stunningly wrong. A good site to browse / get lost / get enlightened is LED Benchmark. They measure all kinds of other interesting things, like flicker, and they give you comparisons to measurements from old-school halogen bulbs as well. Highly recommended.

EDIT: fixed busted URL for LED Benchmark.