Newegg has the HD515 for $55 and HD485 for $80. I've seen it said where the HD485 is better than the HD515, which is ok with me, but is it $25 or 50% better? Basically I'm looking for some info to push me in one direction as I have read data which leads me to believe they're both on even ground when you factor in the price and performance, but any input is welcome. Thanks in advance.