[Shredder]

Hi,
I would like to playback movies from a pc onto a 1080p HDTV

The TV is an Sharp Aqous, it has HDMI inputs , Cable Inputs, Fiber optic Inputs

I have a P5W HD Deluxe Mobo, no processor, no ram, no video, no box.

My signifcant other is already snapping over the other machines running in the house so I was hoping for a medium level solution to watching quality resolution movies from this rig.

I was leaning towards the Q6600 for a processor, 4 x 1 gig Pc6400 OCZ from this gaming rig so I can upgrade the blitz ram :).
Can I use the X1900CF card for the system or would another card be more suited for movie watching in a small room? What cards are best for hdtv output?
Is the onboard sound from the mother board going to be enough using the fiber optic output or do I need an additional card ?
Looking for your expert guidance as always.