I am planning to turn my iMac G5 into a home entertainment system.

I am wondering if its possible to do what I want too do.

I want to connect a Epson PowerLite Home 20 to my iMac. Also want to connect a Focusrite Saffire (LE) external soundcard. Use two pairs of Wharfedale Diamond 8.1 speakers and Center speaker with a REL subwoofer. I am also looking for an amplifier or two for the speakers and one for the subwoofer.

Hopefully someone can point me in the right direction.