I agree with Emir, the sound will not be that much different, it will be still coming from your unit.
Actually I would avoid using two AD/DA conversions as much as possible cause each one degrades the signal. First in converters in Pandora, and then converters in soundcard. Although if you get 0404 or 1212m, the converters are enough quality to not notice the difference at all.
There is one more thing, I also plan to buy 1212m package soon, and I must say it is a very clever buy. Although it is a similar card to 0404 in terms of processing, it has much better converters that will surely make the difference. Also it has EDI interface, where you can connect their external box unit, or some other unit to support more inputs.
And regarding P5XD to EMU, it you buy any EMU, use the EMU as ASIO card of course, and plug the P5XD to it - not because it will give you the better sound, but because EMU is a proper soundcard, and P5XD is, as Emir stated, more guitar tool then soundcard.
I appreciate the help, but would you mind looking my last post on this thread, and give me your thoughts, I already purchased a audio card ( you¨'ll find out in the post
)
cheers