i have a dell i9300 with just a headphone/mic jack on the side and i also bought a turtle beach roadie external sound card. the speakers i want to buy are the creative g500. if i use the turtle beach 5.1cable with the green/orange/black 3.5mm jacks to the g500's 3 input connections with a short male-to-male 3.5mm cable connecting them would that give me decent sound quality still?

http://www.turtle-beach.com/site/products/audioadv/roadie/indetail.asp
http://www.creative.com/products/product.asp?category=4&subcategory=25&product=10814