I'm in the market for a new CD player and am a little perplexed by the XX-bit specification. I noticed that some 18-bit players are more expensive than some 20-bit and 24-bit players. Choosing among 18, 20, and 24-bit players, is this something I need to concern myself with? Or does it not matter? I did a search on HTF and Google, without much luck. All I found was that there may be a signal-to-noise ratio difference.