Some body else already posted this but, this would have to be my favourite artwork. Just love seeing Commander O'Shovah jumping into orks to fight them head on.
Rogal Dorn with his legion Leman of the Russ My two favorite legions (chapters w/e) portrayed in two awesome wallpapers.
Haha, I'll let it slide this time, only because all the other pictures were still good. Heres a random one from me.
"Captain Titus succinctly explains to a Traitor the error of his ways." - Warhammer 40,000: Space Marine concept art.
papercraft art, i found this model in a forum cz, http://www.papirovemodelarstvi.cz/forum/viewtopic.php?t=3429&postdays=0&postorder=asc&start=0 , is easy to mount and include 2 models, ultramarines and blood angels with 3 type of weapons. download: http://uloz.to/xy3vv6z/final-zip
