What’s your opinion about Dali speakers?

There is so much necessary information lacking here it’s impossible to give you any meaningful recommendations or advice whatsoever.  

@soix +1

Here'er some questions for the OP to address:

1. Existing speakers and configuration?

2. Surround room environment - shape, treatments, bright or warm sounding?

3. Budget

4. Existing amplification and components

5. Preferred sound and volume

Are you looking at them b/c of the hybrid tweeter?

Dali hasn't really impacted the USA market as much as some of the other household brands yet, but I've found them to compete on a cost basis with them. When shopping for surround sound you're likely looking at paradigm, kef, klipsch, polk, revel, b&w and whatever BB has on sale. Dali has a huge lineup worth investigating.