Hooly shittballs! Snakes in a Mo**er F***in' chassis!!
I really can honestly recommend the Asus Xonar DX. it is a great little card, so much better than the lame stock realtek. It has tons of options and is easy to use.
No I have not but it is pretty dang good and can be gotten cheap used.
I will start off, although my computers never stay the same for very long. Case is the Antec P182, computer consists of eVGA 680i, E6600, 2GB Tracer 1066, ASUS 8800GTX, Corsair 620HX PSU, 2x 320GB Seagate, Pioneer 18x DVD+RW. Cooling consists of 3x 120mm case fans, Corsair Airflow ram fan and Corsair Nautilus water cooling.