What do you mean by HD? HD Radio?
That motherboard should be fine. Segate laptop drives are usually quite nice and reliable.A slot-loaded dvd player is definatley a good idea. Turtle Beach makes good budget level sound cards. Assuming your dvd is sata then you don't need to convert it to usb so long as your center console is within 3 m. And yes that sound card can be connected to the motherboard.
Let me know if you have any other questions.