I'd have to agree, GC2B makes a pretty good binder (I had to go a size up due to back problems, so it doesn't completely flatten me, but it does for most people). I got the half-binder, so I could wear it at work occasionally without dying from heat stroke or sweating out all my fluids. While it is nice to have my stomach free while I bind, the bottom of the binder kind of pokes out in the front. I thought it was just because I bought the wrong size, but I saw someone else post the same result on tumblr, so idk. Maybe the full length is just the better option. There are some things I absolutely can't wear with my binder because of this.
If your nipples are your only real issue, you could try to figure out some way of tapping them down (I've heard of other men doing that, but they didn't mention methods). While I'm a B cup and would have less dramatic results, I'm considering looking into it. I have puffy areolas, and a lot of times they show through my clothes more than my boob lumps. Some of my shirts would make me look completely flat if it weren't for my nipples. :/ I'm considering trying pasties or something and going from there.