Well X1900XT prices have droped in the past month. I bought mine for $400 on newegg now the same one with the IceQ3 cooler on it is $50 cheaper. I have an idea why too. ATI is releasin a X1950 which is a X1900 but with GDDR4 memory at 3.2GHz. Article: http://www.dailytech.com/article.aspx?newsid=3446
ATI's advisory documentation claims the Radeon X1950XTX will begin sample availability on August 7, with the CrossFire sampling beginning exactly one week later. Sampling of the Radeon X1900XT 256MB will begin immediately.