USB sound through Deneb question & opinion?

[save2600]

Okay... so it looks as if you can get these dirt cheap. An ePay search for USB sound reveals little buggers starting at $1 BIN! So... are these worth a dang for playing back AHI stuff like .mp3's? I assume native Amiga sound wouldn't get piped through there. Anyone here have experience with these USB sound card dongles? Am I better off getting a Zorro II sound card?

[save2600]

I'd imagine a USB soundcard would have better fidelity than the 8-bit Paula. Can anyone confirm?

Also, what is the load on the CPU like when using the external USB sound? I assume the same since the CPU is
still decoding, but again - with better fidelity?