I am about to purchase 3 Radeon HD 5970's, but I am unsure which manufacturer to go with. I found some really cheap refurb's from Visiontek, but I am concerned that maybe they aren't the best choice. Any recommendations?

Here is the link to that video card: http://www.unityelectronics.com/products/6428/Visiontek_Radeon_HD_5970_GFX_x16_PCI_E_PCI_Express_2GB_GDDR5_BBA_2560x1600_Video_Card_Dual_DVI_Mini_DVI_400579_Refurbished