I'm no audiophile, but I want to upgrade to the best headset I can buy(or at least the best one under $500). Judging from the other threads I've seen, it looks like my best bet is the beyerdynamic mmx- 300. Currently, I'm using Turtle Beach X12s, so there is a lot of potential for improvement. One of the main things I want in my headset is a mic that hardly picks up background noise. This is quite important, as my dogs bark very loudly. Does the mmx-300 mic filter out background noise well? Also, what sort of surround sound is it, and would I need a mixamp? If it turns out my sound card isn't good enough or doesn't exist (can't check right now), what would be the cheapest option? And finally, is it the just the best headset for what I want, or is there something better? I will likely use it for gaming, some music, and possibly recording for Youtube.
I'm sorry if I'm asking any wrong questions or anything. I'm very new here, and want to ensure I'm getting the best before I spend $400. Thank you for your time.