I "did" DT for about 2-3 years, listening to them almost exclusively every single day. I haven't found a single band with such depth, versatility, and massive body of work before or since. For this reason, they're my all time favorite band.
It's really hard to find anything new that stirs up interest, most of the stuff mentioned here do absolutely nothing for me (Fates Warning, Haken, The Flower Kings, Pain of Salvation, Transatlantic, Spock's Beard, Neil Morse, Porcupine Tree). My gripe with all these bands it's that the vocals and vocal melodies sound cheesy to me, and whatever they do instrumentally, it can't redeem it. The more I experiment with new music, the more I realize what an amazing singer JLB is (at least in the studio). He really deserves all the praise and nothing but.
The modern prog bands that clicked with me both have great, unique, and kickass vocals. Symphony X (Paradise Lost and especially Underworld - Russell Allen became my favorite vocalist) and Riverside (Anno Domini HD).
I've also had enormous fun with Children of Bodom (Hatebreeder, Follow the Reaper, Hate Crew Deathroll). They're so engaging and energetic, it's incredible. They wrote some of my all-time favorite melodies, and show amazing consistency on those 3 albums.
I'm looking forward to Sons of Apollo, seems like it has potential.