Bones vs. Silva is the fight I want to see. Silva has fought at light heavyweight before.
People have been pushing GSP vs Silva, but GSP is at such a body defecit in the higher weight class that I don't think it's smart for him to take that fight.
As far as the old days go, the current owners are trying their best to hide that stuff. The old ufc's are mostly only available via old VHS copies. I do understand the weight classes though. It's the only way to legitimize it as an actual sport. For me mma is the most pure form of athletic competition available to us. Sports competitions started as training for combat after all.