I use Underworks tri-top binders, and they don't give me any more problems than a bra does.
When I first started binding, I didn't know that many men actually push/pull their chest down towards their abdomen, so I simply flatten my chest against my ribcage, position my nipples in a natural position and I'm good to go. Doing so gives me the illusion of having pecs, and since I'm pretty muscular anyways, it works.
Mind you, I'm a D-cup, nearly a DD, so a GC2B binder probably wouldn't give me the flatness I need.
Good luck.
Ryuichi
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