Exactly how "loud" is the SP3 suppose to be? I went into Best Buy today to check out the quality of the upgraded sound and with headphone's they let me try off the floor to test it with, I proceeded to go through each SP3 they had on display (4 in all) and in each case, the volume was barely audible. I cranked the music player up to max as well as the headphone volume control and as I said before, you could barely hear anything. Anyone else having this issue at all with their own SP3 at home or did I happen to stumble across the 4 crappiest floor demos, all with the same problem under one roof?