beware of C****m**d the last time i checked their prices were $100 more than retail price, because that time Singapore Creative didn't launch here first. Do check creative's price first..SLS is a place for those who know their stuff, if not u'll get trapped like tourists.
Back to the product, its as bang-for-buck as it can get. Compared to the M-Audio solutions its a better choice at the price point..dont think twice.
About mp3 playback, please note emu line of cards are for semi-professional use so it cannot b compared to a mainstream card like creative's gamer and home studio ones. The core of the audio chipset is different and currently there are only a few cards in the world that can act as both multimedia and professional. Normally it is suggested that u use a separate card (or ur onboard sound) for normal playback..latency and performance is affected in the longrun if u use ur professional card as default for desktop audio. FireWire and PCI should b prefered over USB due to inferior throughput, but not really a big matter.