Hi Steve - agreed - but I get the impression from some of the comments that introducing our CD Player and our DAC was a waste of time given that most products have built in DAC's and everyone knows that today you get a free CD player when you buy a fridge. 
I guess my point is that if I was not trying to better the sound performance level first and foremost in some meaningful way -- especially with high resolution material -- I would not have taken this project on.
Ah, but there is the difference. I fully agree that separating the transport and DAC made sense because there was an identifiable issue with the mechanical transfer of data from the CD to the DAC and then high quality analog output.
Now we are talking about
starting from a digital source, so the only value of the BDP-1 is to take that digital file and pass it to the DAC. The user interface, the ability to connect to remote data sources to avoid local storage, and the ability to manage play lists and multi-room setups becomes key.
The Slim Devices ecology - players, server side software, and open source model does all that very well. I don't really care that Logitech bought the company from a support point of view because I don't need support. The player works physically, and the community drives the software side.
Having both the Transporter and the BDA-1, I can say that the sound difference is barely noticeable when using the Transporter's analog outputs, and of course non-existent if using the digital outputs.
Those of us currently using mature systems can't see the value in the BDP-1 because it doesn't bring the full chain for playing digital files.
Those new to the idea of digital music and/or computers may appreciate the BDP-1. I just doubt they will be up for the fact that the whole concept requires locally attached storage and a third party software solution to control the player.
My collection sits where it belongs on a NAS, and is accessed across the network. I have no desire to complicate my life by requiring that I clone parts of my library to a physical USB device so that it can be attached to the BDP-1.