For me better is Dahua, i mount lot of it. Especially analog CVI, work perfectly. You can see my work at www.sektor.rs/galerija.html
Dahua have good P2P, much better that HIk. For Hik you need to build account on hik connect site, need 10 min for that. Also if you forgot that account, dvr will be lockt.
Dahua have much better server respond time, faster...