Woo, Quo Vadis is quite good. They're from Quebec.
But yeah, if you hear older Opeth, they are much more traditional death metal. Their first 2 albums had some sections with the 2 quitar harmony, and stuff. But as they started making more stuff and experimenting, they began to really change. However, their recent album Watershed is a return to their old sound, mixing in the sort of jazz influenced stuff from the recent albums with a more traditional approach to the heavy parts.
I have been following Opeth a fair bit.
Also, I forgot to mention that I got to see an Ill Scarlett concert a couple days ago (Tuesday) at my college. They played at the campus bar. That was an awesome show.