Ive done a search and found some good info, but Im still on the fence. I have a db680 pre and I want to get either a 728 for it or get the db750. One of the things I need is volume, wich rig would be louder? I know the weight on the 728 is big but I have other gear for smaller rooms. Any pros or cons that might help me go one way or the other? Thanks.