Hello,
I'd thought i'd give you my solution for sound on my install.
I use a grifin firewave soundcard:
http://www.griffintechnology.com/products/firewave
It has the ability of 5.1 surround, it uses 1/8" or 3.5mm stereo mini jacks, so it can easily be hooked up to your amp by using these:
http://www.maplin.co.uk/Module.aspx?...31700&doy=28m4
The sound quality is good and I have no noise issues.
But the sound card does not remember its settings after a shut down. But I leave it in its default settiing which is good enough for me.
Hopes this helps.
nick