Cynic would be a great fit! Agalloch has a hard enough time fitting in a handful of live shows a year so I doubt we'll see them on a big tour like PN. Love to see Katatonia as well, even though they're not that progressive. PT is also a good fit.
Well, Progressive Nation is DT's tour, so they'll probably always be playing it...
ProgNation 09'
Enslaved
Devin Townsend Band
Mars Volta
Opeth
reinforced tour
Queensryche
Anathema
Porcupine Tree
Opeth
Dream Theater
Rush
Pink Floyd [reunited]
period
Well then, it's not something for everyone, because I do not care for, or do not know, any of those bands.