Okay guys im verrrrry new to this so i know im about to ask alot of dumb questions. I have always love my music and sound quality and thus recently began the search for a kickass soundcard for my PC. This will be the first soundcard i have bought and used other than onboard sound. Anyway i have got my heart set on the ASUS Xonar Essence ST PCI soundcard. I recently purchased some nice Sennheiser PC360 Headphones and have Logitech Z5500 5.1 Speakers. That brings me to my questions- After my initial reading i have learnt that when you get a soundcard you can choose to plug in your speakers analogue OR Digital. 1.) Firstly- What gives you this choice? How do you choose? As far as i know you plug cables into holes and don't have a choice. 2.)Next i Know the z5500s have their own DAC. I have read that i should preferably use analogue so that i am using my new soundcards DAC and not bypassing it. ( getting a soundcard for a reason not just so i can keep my speakers doing all the work). How do i do this? 3.) I have also found out about the H6 extension card and would like to know exactly what it is this card does? What difference it makes. I read some people with a similar problem suggesting using 3x 3.5mm rca to 2x phono cables. So that you can separate the speakers. My question is what would the above setup allow? - And is it analogue or digital? Here is a link to the above :http://www.head-fi.org/forum/thread...rd-logitech-z-5500-digital-5-1-speaker-system Thanks very much and hope nothing is toooo dumb a question!