Is there a way to stream iTunes to a Blu-Ray playe

Don't need the blue ray player.

You can use an Airport Express......to a DAC or use the analogue outs TO the stereo. The AirportExpress can run in 'client' mode, as a dead end without need for router or other wireless network. Your laptop must have wireless for this to work.

I do this with my iMac to my stereo to great effect. Since I'm all over the house, i carry my iPod touch and use it as a remote with the free ap.