Nightmare is completely ruined for me by that Portnoy barking part; the song is really good up until then but after that I simply can't take it seriously. To me, Rudess's solos add to the song about 1% of the time (the intro to Endless Sacrifice is all that stands out as tasteful right now); it's as if they're thinking "Well, Petrucci had his turn to solo, now it's Jordan's" without actually considering whether or not it will drag the song down or not. Hint: it always does.
Aside from his solo, though, I think Rite is a solid song. Nothing's bad on Black Clouds, per say... it's just that Systematic is far stronger to me. I really like Wither if I'm in the right mood, though. That's some powerful stuff.