Continuing the tradition of "The Best/Worst/.." threads, I ask you: What is the most underrated Space Marine unit?
While I'm tempted to say Bikes (if I use them, and keep disciplined -- not rushing them into battle, instead using them as a harassing, flanking force -- they do well by me), my vote would have to be for Scouts w/Hvy Bolter. Every time I've played these guys they've done great. They infiltrate, deal reliable and consistant damage to the enemy, and are inconspicuous enough to not draw immediate fire.
Andy