Tightwad Audiophile

A few cheap DAC options to consider:

http://nuforce.com/index.php?option=com_k2&view=item&id=4:udac-2&Itemid=186#design

A used one in Baton Rouge: http://batonrouge.craigslist.org/ele/3410812609.html

Review: http://www.soundandvisionmag.com/article/review-fiio-e10-hrt-headstreamer-and-nuforce-udac-2se-usb-dacheadphone-amplifiers

http://fiio.com.cn/products/index.aspx?ID=100000017625376&MenuID=105026003

http://www.parts-express.com/pe/showdetl.cfm?partnumber=310-332

http://highresolutiontechnologies.com/

http://schiit.com/cart/index.php?main_page=product_info&cPath=0&products_id=14