Hello everyone, im new to head-fi even though i am always looking through these threads and finally decided to sign up. I just recently started getting into the audiophile world when i demo'd my first pair of hd650s a few months ago. Just recetly tried the hd 700's and completely fell in love with them at a local store. At the store they were powered by some ok gear, about $300. So my questions are would these headphones be driving fine with my asus rampage IV black edition Supreme FX black on-board sound card for a couple of weeks without completely losing all the quality i fell in love with in the store? Also i am looking for a good amp and dac setup for my pc for around $500, what would you guys recommend? 
 
Thank you in advance 

I have a WA2 with an Arcam rDac. Its a pretty great setup. But, thats north of 1k.... 
 
I would suggest a Asgard 2 or Valhalla 2 as an amp and Bifrost DAC used or new for around $500-600 for the pair. 
 
NEW:
http://schiit.com/products/bifrost
http://schiit.com/products/asgard-2
http://schiit.com/products/valhalla-2
 
 
Used:
http://www.head-fi.org/t/720033/fs-schiit-audio-lyr-hybrid-headphone-amp
http://www.head-fi.org/t/737094/schiit-bifrost-uber-usb-2-0-sold-and-asgard-2-available
http://www.head-fi.org/t/736807/schiit-for-some-new-headphones 
 
 
ORRR! You can get a Burson Audio ha-160ds for $300 used.
 
Used: 
http://www.head-fi.org/t/725669/fs-used-burson-audio-ha-160ds-headphone-amp-dac-300
 
 
Hope it helps.