Anyone using a Blu-Ray player as a transport?

Sidssp, I am referring to the upsampling of the CD.
I wouldn't be using the Blu-Ray transport for video at all,
instead simply as a CD transport.
Why do you say that the upsampling of CD will not necessarily sound better?

Cmalak, I am under the impression that the Blu-Ray will
upsample to essentially SACD with Redbook CD's and that it will provide upsampled data at the digital audio outputs. I could be wrong on this, hense the questions. Also I am under the impression that the Blu-Ray drive is able to read the data at a quicker rate than my Wadia. Again, not sure if this is correct but one of my audio friends is of the impression that a DVD drive operates at a higher read rate than his CD dedicated transport and that a Blu-Ray will operate at a higher rate still.
I am contemplating adding the Blu-Ray player as a front end to my Boulder to replace the Wadia.
However, I'm not sure if this would be a downgrade or not.

Almarg, That is very helpful. Though I still wander if due to the potential faster read of the data that there would be less potential for read error.
Is anyone currently using a Blu-Ray as a transport that would like to offer an opinion on the sound vs. their old transport?