There aren't many. Depending on what speakers you have already or what you may be considering spending on new ones, it would be easier and cheaper to get a DAC separately. Even if you are considering new speakers, you won't be limited to a very small handful.
link
You can get a USB cable with them rather than a mains power plug, but it's better to use mains because USB can transmit electrical noise. You want no electrical wires connecting the DAC or speakers to the PC.