I have never heard the Dali's but I did own the original Dyn C1 then upgraded to the Dyn C1 Signature. I personally can't say enough good things regarding Dyns. But I will have to say what best suits your system is YOUR EARS and your budget of course. If you do decide on the C1's make sure you either get the Stand4 or Stand6. If there is any way you can audition both especially side by side that would be very good but an in home audition would be the absolute best.
Good luck
Good luck