I do sympathise with Rainard Jalen - I've heard a lot of Porcupine Tree, and what I've heard doesn't sound like Prog to me. Same goes for The Flower Kings. I think the music is rather run-of-the-mill, but I wouldn't say it apes Classic Prog - the whole idea of creating
new music is lost in the haze of simply trying to create
new-sounding music.
Voted for Muse - they at least sound a bit proggy, and write music that goes along with a few of Prog's principles; It's outrageously bombastic, rips off Classical music at any given opportunity, and isn't always a bunch of simple riffs in a pop song format. Note: isn't always...
I like the Ozrics - I played bass for them once...