The AD8620BR is $20 (in small qty). While you can hear opamp differences in circuits made to take any old opamp, a good circuit built around a good cheaper opamp would sound just as good, if not better, and be way cheaper. Given opamps like the LM4562 are so cheap, I can't help but think they are trying to cater to audiophiles that will buy based on recognizable model numbers, using AD8620 and JRC 4580.
I wouldn't spend the extra, unless into swapping opamps (Halo), or going for a Xonar STX. The Striker appears to have DTS encoding, too, so if you are actually using it for surround, that's pretty good, given the cost and not being from Creative.
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