Alright well, I am going to order a DT990 this thursday (payday), I am looking to get surround sound on the headphones (apperently capable with these from other topics) I would love to use these portable too. would the Xonar essence be a good choice for powering these without an additional amp...

So my budget is going to be $300 MAX.   I do play games so a built in mic would be very apperciated but not really required (could just get a clip on mic), I am looking for audiophile level headphones (the vengeance 2000's I had decided to take a dump...again, wont bother RMA'ing it. waste of...