Wow, I was not aware that we had so many Dream Theater fans on the forum! DT is one of my favorite bands, and I've been listening to them pretty much nonstop for a couple of months.
I got Scenes From a Memory first, after hearing it at a party (yeah, my friends have pretty good taste), then after being completely blown away, I went out and purchased Six Degrees of Inner Turbulance, which I did not like as much, but it still had its moments and was much better than most of the other stuff I listen to.
Longing for more, I purchased Images and Words, Falling Into Infinity, Train of Thought, and Live at Budokan, and downloaded Awake.
Images and Words blew me away after a couple of listens (I have to listen to an album a few times for it to really register, although some I can enjoy on the first listen).
Falling into Infinity is pretty good, although more mainstream, and most of the prog is lost.
Train of Thought has the coolest album cover I've ever seen, but the music is just little too heavy for me. The vocal effects (sounds like he's talking through a distortion pedal or something) kind of throw me off, because they make it hard to take the songs seriously, although the instruments are mixed well (the guitar has a little too much fuzz, but what can you do?), and some of the riffs are amazing. I think it'tl take a little more getting used to before I can appreciate it's true qualities.
I haven't had too much experience with Live at Budokan, but it seems to be really good quality (although, I don't like some of the songs selected).
Awake is currently my third favorite album I've heard, with good prog all over. Some of the singing is lacking, but I like it overall.
So, I agree with the people here, the singing makes or breaks the band (usually), but most of the time it is pretty good.
I expect Octavarium to be a little like Falling into Infinity, in the sense that the same graphic artist designed each cover (I'm assuming this, although I have done no research ). I hope that they lost the edge from Train of Thought, cut the cheese on 6DOIT, and got back into their vocal/intrument interation groove found on Images and Words, and maybe a concept album like Scenes From a Memory (Is that too much to hope for?)
Anyway, I'm looking to expand my library further than Octavarium, any of you buffs got any suggestions?