I think my favorite Space Marine unit is my Dreadnought. I really love the idea of it... a revered ancient warrior, entombed just prior to his death in a suit of powered armor... becoming a living weapon... so cool. And the new plastic dread kit is really nice, very convertable, with swappable arms, etc. Now, GW has a IA article on these awesome war machines here. Lotsa pix, wallpaper, pdfs, etc. Cool!