Is possibe that other BB types can also creak, though?
Right now, I have one bike with BB30 and another English threaded. Both seem to work well. Both bikes did have creaks at one point that had to be diagnosed, but they weren't BB-related at the end of the day. I'm no wrench, though, so my opinion is worth less than $0.02.
the creaking BB-30 is easy to fix, I just don't like the fact that it requires as much maintainence as it does. The builder may have some thoughts on which BB he wants to build around as well. I'm using 6800 cranks now, but I like the idea of having other options. Maybe BB-386evo would be a good option.