Re: Mike Portnoy Quits DT??
I think John Petrucci and Jordan Rudess as well are as much of Dream Theater's essence as MP, so I'm pretty confident they'll be able to move on.
I'm more concerned about Mike's stage presence and personality, which will missed at the shows, and harder to replace in my opinion.
As for the last 2 albums - I think Black Clouds... is much better than Systematic Chaos. Black Clouds has some quite strong songs in it, and I actually enjoy listening to the album once in a while. Although they made several stronger albums in the past I think there's no point in recycling those eras and trying to produce another effort the "old fashion" way.