Thanks to iTunes, Web radio, and sites like Pandora, more computers are doing double duty as stereos. Can these speakers do your music justice?

HARMAN KARDON GLA-55 ('…'…'…'…)

Bell chimes and cymbal crashes on a U2 song were loud and clear on these speakers, which have 112 watts of combined power for lots of volume. Touch-sensitive volume buttons were easy to adjust, and the casing, made from the same material as bulletproof glass, makes a bold statement. COST: $1,000

ALTEC LANSING EXPRESSIONIST ULTRA ('…'…'…)

Our second choice, these speakers had less-distinct bass than the Harman Kardons, even with a separate subwoofer, but they reached a higher volume, thanks to 88 extra watts of power. On the downside, the dial on the volume controller was hard to turn. COST: $199

KLIPSCH PROMEDIA 2.1 WIRELESS ('…'…)

These speakers sync with your computer wirelessly using a USB dongle, though they connect with wires to a subwoofer that plugs into an outlet. The speakers have a peak power of 200 watts, but the sound was a bit fuzzy, perhaps because of wireless interference. COST: $199

JBL CREATURE III ('…)

These small speakers, which are just 2 inches tall, produce surprisingly distinct sound and feature handy touch-sensitive volume controls. But with a combined peak power of just 10 watts, they have the least oomph of the test group, and they look a bit flimsy. COST: $130