Extreme PC has already got an Extreme PC Exclusive, the SI Diamond Radeon HD2900XT with 825MHz Core, 1GB 2100MHz DDR4, PCI-E DX10 /2 DVI/ HDTV/ AVIVO/ HDMI/ AC3 5.1 Sound in stock for $599.95 Canadian.
If you order a compete PC, the Radeon HD 2900XT 1 GB card will only cost you $549.95. If you are wondering about performance, the card will scores 12,944 on an overclocked Kentsfield and 3Dmark06 and 19,390 in a Crossfire setup.
The most interesting part is that the card is using a normal reference R600 cooler and works just fine with this.
It is available at press time and you can buy it here