Lowest I could find on PW was $31 for an SB0060 and $32 for an SB0226.
If I'm not mistaken, the SB0060 is a Live! and the SB0226 is a Live! +MP3. Don't ask me what the difference is. They both use the same chip.
EDIT - I don't know about the Chaintech one. It's 7.1 . . . but will you use that? Hell, I don't even use the 5.1.