Zub wrote:Imperial fists.
Tactical marines get BS5.
Breachers get BS5 and +1T.
Heavy support squads have tank hunters.
All for free.
Imperial Fists make Tactical Marines amazing (They make entire squads of my Blood Angels disappear when they use Fury of The Legion) and their infantry is great. They are a very flexible force that can be configured for footslogging or deep striking, shooting or assault, anything really. And (while challenging) they are a very rewarding army to paint (in my opinion).
P.S. I am probably super biased because I love Rogal Dorn, but I think my point on their tactical squads was fair.