The first album is one of my favorite albums ever. Tallest Tree is my favorite track on it. Second album was kind of a letdown to me. Never found anything on it memorable. It was just a weaker copy of the first album.
I also have the three albums by the band's other incarnation, Harmony, but I don't think they come close to the Darkwater stuff. Swap one band member and you have a whole new band, apparently. Though to be fair, Harmony is more melodic Christian metal, rather than the prog metal Dream Theater-esque stuff you get with Darkwater.