Agalloch's music is flawless and intelligent. All of "She Painted Fire across the Skyline" is brilliant.
They are a very unique band, the more you listen to them the more obvious the talent becomes.
Also becomes obvious they are nothing like Opeth at all, they are totally different influences and song structures.
It seems that people think that just because a metal band uses acoustic guitars and blends of grim/clean vocals, that they sound like Opeth. The truth is that bands like Bathory did this a long time before anyone else did, and not only that, but other bands in other Metal genres were also doing the same at the same time that Opeth became known in the very early 90's. It was a "movement", not a founding technique by Opeth.
It just so happens that Opeth pull it off better than many other bands do.
The cream of the crop in my opinion (in no order):
Agalloch, Vintersorg, Borknagar, Fission, Opeth