I have mostly seen iball bundled with cheap cases, not a good sign. Ive also remember reading several threads complaining about their reliability. http://www.newegg.com/Product/Product.aspx?Item=N82E16817341012
$40 after rebate will run a 4850
Good choice. If they O.P. can't swing that I wouldn't go any higher than a 9800 GT with his current PS (preferably that new "energy efficient" one that doesn't require a six pin cable).