Well from the one week in total (including ban) that I've been around...
I'd say Mandown and Musictalker. They seem to be more mature and they come up with very good arguments. But one of them is a little delusional sometimes as my siggy will show
Haus of Nicole is very eloquent but her logic fails me sometimes. Especially when it comes to Gaga lately
Oshishh seems to be a more fun version of Nicole