Thanks for the awesome conceptart blog link =), didn't see that page yet. I usually browse around on conceptart.org, there are always a couple of environment art threads in the finally finished section.
Good thread: http://www.conceptart.org/forums/showthread.php?t=76443 Book is pretty good for that style: http://allods.gpotato.com/?m=media&a=conceptart Pretty much anyone in here: http://turtleart.net/artists.php I could go on.