When buying home theater speakers, it's important to consider the following factors:

-Size and design: Make sure the speakers will fit in your room and match your decor.

-Number of speakers: A typical home theater setup includes a center channel speaker, left and right front speakers, left and right surround speakers, left and right surround back speakers, and possibly Atmos speakers.

-Power and sensitivity: Make sure the speakers can handle the power output of your AV receiver.

-Placement and mounting of the speakers: Are you mounting them onto a wall or floorstanding? Do you need in-ceiling speakers for the surround speakers?

-Frequency response: Look for speakers with a wide frequency response for clear and detailed sound.

Also, it's a good idea to audition speakers if possible, by listening to them in a store or at a friend's house, to get a sense of how they sound before you make a purchase.