Not to sound too negative but personally i hate soundblaster products with a passion.
Driver and intergrated software hell and they have been since the release of Live version.
Their advertising brilliance is what really sells those cards (don't be fooled by their 24bit sound specs and the like, it is a bit of tomfoolery).
But, in regards to your issue, any soundcard with a digital out connection should be able to connect to your receiver via an optical toslink or rca coaxial with no problems. Your receiver DAC should take it from there.
A friend of mine runs his this way using a SB Audigy. Other sound cards do exist however including the Turtle Beach Santa Cruz (my sound card) which has a versa jack with an rca digital out and the Hercules Gamesound Fortissimo II (optical in and out).
