Wow - what you just wrote is my life! So I feel for you! We actually moved to a bigger apt and he sleeps in the other room now b/c I'm pregnant and can't pop Tylenol PM's anymore!
Does your husband have sleep apnea? My husband got a sleep apnea machine, only to find that the mask doesn't fit right, and it's been an on going process to find the right type of mask for the past few months. I told him that he's being evicted from that room in a few months (nursery) so he better get on it, b/c he can't continue with the loud snoring once baby arrives.
What seems to work when we are in the same room, is rolling him over so he's sleeping on his belly. Maybe give that a whirl? And like you, I have tinnitus so I can't use ear plugs (which used to work great, but I think that's what gave me the tinnitus now - great).
I feel your pain - there is nothing more frustrating than being woken up and then watching them sleeping soundly, while you stare at the wall. I wish I had a magic answer for us both :(