SR850 VS CREATIVE AURVANA LIVE  ?   I just purchased a sr850, using for PC only / gaming.   I am not content because it seems I need a sound card or amp to get the max potential, I need to max out my PC volume in games, and it still isn't super loud.   I read from brief posts that sr850...

how about the 680b?

looks like amazon has Creative Aurvana Live at $72.. which fits my budget    Would this be the best headphone for PC GAMING for the price?    I am new to headphones and coming from a g35 headset, will I see an improvement? Also, since I am new, will I need a certain sound card or amp to use...