Some new bands I've found (some relevant, some not):
Alcest- Neige's new album(Souvenirs D'un Autre Monde) is so hard to describe for me, but it's definitely one of the best listens I've had in awhile.
Ayreon- If you are interested in a rock opera featuring none other than Mikael Akerfeldt, try the Human Equation. Great album.
Eluvium- I know I've mentioned them, but I have new addiction to post rock/ambient music thanks to Matthew Cooper. My first two albums were Copia and as I mentioned before, An Accidental Memory in Case of Death. And if you like them, try........
Hammock- I haven't heard lots of this band yet, but still, amazing stuff. May I suggest Raising Your Voice... Trying to Stop an Echo
Insomnium- They're one of those bands that once you hear them, you feel obliged to tell everyone them because they're simply amazing. I guess you can somehow compare them to Opeth, but I'm not sure about that. Try Under the Weeping World.
ISIS- Fairly good stuff, I don't quite know how to classify them, but good none the less. Try Red Sea or Panopticon.
Muse- If you're interested in something different, they have a thread all about them on the board. I highly suggest them for a change.
Pelican- Get City of Echoes. I can't guarantee anything, but this album blew my mind. Great instrumental act.
Porcupine Tree- Another band I suggest to everyone. In my mind, Steven Wilson is one of the best musical minds out there today. Not the best, but one of. In Absentia is one of my favorite albums of all time along with Lightbulb Sun. For some different style music, I suggest The Sky Moves Sideways.
The Sword- Psychedelic thrash/whatever metal stuff. I'm not sure you'd like them based on past recommendations, but I've been listening to them quite frequently lately.
That's enough from me for awhile. Hopefully that was helpful, likely it wasn't but so be it.