What amp will you use with them? What are your sonic priorities?
In general, smaller speakers will work best. Setup will be a big consideration. Most speakers sound much better pulled out at least 3ft. from the front wall. So if that's not an option, avoid rear ports especially, and look for designs made to be used near the wall. Their aren't many but there are a few good ones. Larsen and Audio Note are the first that come to mind. Many Devores work well in smaller spaces.
The more you share about what you prioritize, the more helpful the responses will be. Cheers,
Spencer