You're fairly out of order for what I would do. I would put Images at #1, Scenes lower and Six Degrees a lot lower, DT12 lower, ToT and BCSL a lot higher and FII and 8VM higher. However, I think you're a lot closer to the general consensus of this forum than I am, so...
To elaborate on this, since other people have also been posting their own lists (and, yes, because I do want to have an opportunity to consider and publish what my ranking looks like currently), my list at the moment would look something like this.
1.
Images and Words2.
Black Clouds & Silver Linings3.
A Dramatic Turn of Events4.
Falling Into Infinity5.
Train of Thought6.
Awake7.
Octavarium8.
Metropolis, Pt. 2: Scenes From a Memory9.
Dream Theater10.
When Dream and Day Unite11.
Systematic Chaos12.
Six Degrees of Inner TurbulenceWhich is actually radically different from what I posted a few months ago when I did my top 50. I think only 1, 10 and 12 stayed in the same place. Basically what I found was that
Awake, 8VM, SFAM and SC have dropped in my esteem while ADTOE and FII dramatically rose. I think there's a shift underway in the way I view Dream Theater's music entirely, so I don't think these rankings will stay the same long term. Most notably, I think BCSL is #2 right now only by default, and it's likely to be overtaken before long by ADTOE or FII (or a resurgence of
Awake or something, who knows).
Now that I look at this side-by-side with yours, ours are radically different, aren't they? Images, ADTOE,
Awake, SC and WDADU are the only ones we'd even put in the same half of the discography! But I think that's just a testament to the strength of the Dream Theater discography as a whole and the fact that they have a lot of different facets that appeal to different people in a whole myriad of ways.