pentaxuser - I second your point about the blacks. You are also right - it was very dark and considering I had such a small gap in the rain, I was pleased to get any useable shots. The suit was black but I agree - I would have liked a little more detail.
I must admit to being a little panicked overall on the day because at the start of the day I wasn't sure what I was going to do about the rain because the priest would not allow group shots in the church, or flash, and the reception was not at a venue that lends itself to high photographic opportunities. If it weren't for the one hour rain gap, I don't know what I would have done quite frankly - driven them to a more suitable location I guess?