It looks like your PC has plenty of performance to run just about any audiophile player and any software convolution engine... If Foobar2000 supports VST style plugins for convolution you may be all set to create some room correction filters with REW or work with Mitch Barnett at Accurate Sound to help you create some room correction FIR DSP filters... If your running your player/pc into a stereo DAC and to a stereo preamp and stereo amp you shouldn't need any additional hardware unless you are looking at running multiple amped exotic speakers and multiple subs... If that's the case you need to look at the MiniDSP, DBX, Behringer, Xiliva, etc for speaker management systems...