I haven't voted because I haven't had the opportunity to watch Hamer live or on TV across a full match. I think its actually a very tough choice because I like Bachmann, and he was made captain for a reason, and I don't think there's anything particularly from a goalkeeping standpoint that means he should lose his place.
There's also a risk unique to goalkeepers you end up in a situation where you kind of force him out of the club at the end of the season because of some temporary decision about form. Even if you think Hamer is the better choice right now, Hamer isn't the long-term solution, so that would mean bringing in a new number 1 next year.
Having said that, it's hard to drop someone that saved a penalty, and Bachmann may be a bit more of a liability in terms of getting carded.