The BDA-1 reportedly does as good a job with jitter rejection as anything else out on the market. I've heard it many times, but didn't throw a bunch of transports at it.
The BDA-1 and DAC1 sound pretty different from each other. Both are a polished, studio type sound if you will, but the BDA-1 pulls of musicality far better to my ears than the DAC1. Musicality is different to different people, so take my opinion as you will. To my ears, the DAC1 sounds a bit bleached and sterile. It's a very good DAC and can sound great in the right system, but I think the BDA-1 sounds better in more systems, perhaps making it more forgiving if you will. This stuff is all subjective though.