Hi there.
If it is of any interest to you, you can play movies, music and photos from any pc with windows media player wirelessly via a PS3 and it outputs a very good image. I'm not sure exactly how much upscaling it does, but it is a vast improvement on the dvi connection I had been using before the PS3 arrived. My PS3 is outputting everything through the Onkyo TX-SR605.
Of course you need to have a wireless router for this setup to work and a PS3 is only £300 compared to the £1500 mentioned above.
Just a thought!
Cheers