This would definately be best for under $200:http://www.newegg.com/Product/Product.asp?Item=N82E16814130056 only problem is that it requires a 400W power supply, so you need to make sure that your power supply is big enough to handle it.  That info should be in the manual that came with your PC.  If you need further assistance, feel free to email me, it is in my profile.