Yea sorry it's the 4780 that is this price... is there a big difference in term of performance? Where did you buy your card btw?
i bought my card from directcanada.com. but $400 is still $100 too much even for a 4870. it should be around $300. the performance difference is about 30% if i remember correctly. the 4850 is the better buy in terms of price/performance though. but the 4850 is best for lower resolutions, pretty much anything under 1920x1200.