I think it's their most solid release, I think the only miss is Recury... alot of people don't like Hub (I quite like it though) either way, for most people there's only one track that doesn't quite do it for them. And even Recury I think is at least 'good'... it's just not nearly as good as the rest of the album.
Anyway... that's besides the point...
I do like LP5 a bit more because, although I think it has a few more low points, overall it has more emotional impact.... it's their saddest and most disturbing album. Plus I've owned it for longer... it was the 3rd or 4th CD I ever owned, so it has nostalgic value for me personally.
But Chiastic Slide is defenitely second best for me... or first equal :)