Good luck coming out to your bros - I'm sure it'll all go well
Sometimes, though, you will have to be patient with some of your friends. In my personal experience, I remember that when I came out to one particular friend, we went through a few rough patches. Although he was 100% supportive of me, I couldn't help but notice that he suddenly became uncomfortable around me sometimes - such as when we would change in a locker room, take a piss in the men's room, or I would play defense during an intense pickup game of bball. Despite that discomfort, though, I could see that he was consciously making an effort to be supportive of me and preserve our friendship.
I say this, not to denounce my friend as "homophobic" or "unsupportive" but rather to address some of the realities of coming out to straight men. Sure, some guys have ABSOLUTELY no problem and will still not care, both in word in action (These are the guys that will still be willing to skinny dip or go nude with you in a hot spring). Yet other guys may find out that as much as they want to support you as a friend, unconsciously they may be slightly uncomfortable. Should this happen with any of your friends, I suggest that you be patient with them and talk it all out. In the case of my friend, I find that despite his fear of me seeing him penis, he has been way more supportive of me then some of my other friends, whom I have seen nude countless times. (And after talking over a couple of beers, this friend also outgrew his discomfort of me playing defense on the court.)
I guess the point I want to make is that supportive friends come in many different types - and some of them may have quirks (such as a sudden irrational fear of being seen nude). But at the end of the day, if you and a friend are able to openly discuss any potential barriers to your friendship and overcome them, such people are always worth keeping no matter what. Ideally all of your friends should be 100% supportive the moment you come out, but just be aware that others of them may be like a stubborn family member: they will still care about you, they still want to be friends with you, but the two of you will have to do a bit of talking in order to gain mutual understanding (which trust me, is totally worth it).