Some options for you. I have the 3 way single arm holding my 24" monitor and love it.
http://www.monoprice.com/products/product.asp?c_id=109&cp_id=10828&cs_id=1082808&p_id=5560&seq=1&format=2...
The AT AD700s are very easy to drive, so try them out with your current sound card. They are great for gaming, have a huge wide open soundstage, and are fairly neutral, so kind of a jack of all trades with music. They are also incredibly comfortable, and can easily wear them for hours watching...