DYI vs Powered PC Rig

[thinker311]

I am just using these sytems as examples and nouthing more. I am realy just trying to understand how the two diff types of equipment pair against each other. There are so many diff possible combinations with a DYI. Of corse, when u look at the whole picture a reciever-speaker system will always win over say a pc audio system. But if the specks between the two are similar.......

Now, with pc hardware, the audio card is important to know. For the sake of argument it is a audigy2 ZS. Now that information shouldnt really matter, becaue the pc audio rig i will be using as an example has external decoders. So, technically i could just bypass the sound card.

Logitech Z5500....site link below
http://www.logitech.com/index.cfm/pr...CONTENTID=9486

VS

Yamaha YHT-150....reciever and speaker pdfs below
http://www.yamaha.com/yec/customer/m...s/HTR_5730.PDF
http://www.yamaha.com/yec/customer/m.../NS-AP1500.pdf
http://www.yamaha.com/yec/customer/m..._SW010_030.PDF

Any insight or key differences between the two would be greatly appreciated.