Our definition of mainstream video cards encompasses the $100-$199 price range, and is really where you'll get the most bang for your buck. This is where you will find the latest mainstream video cards, like the Radeon X700 Pro and GeForce 6600 and 6600GT, along with a few higher-end products that have been replaced at the top of the food chain (like the Radeon X800), and have then dropped in price.
The mainstream video card list is usually where we see a few noticeable price drops mixed in with some high-end cards dropping below the $200 mark and entering the mainstream market. We stay true to form again this month, and both the ATI Radeon X800 256MB AGP and ATI Radeon X800 Pro 256MB PCIe received price cuts of $20 or more, and dropped from the high-end chart into the mainstream. This is great news for buyers at the $200 level, as both of these provide excellent performance for the AGP and PCI Express segments. The best overall value continues to be the GeForce 6600GT 128MB boards (either AGP or PCIe) but the two newly-anointed ATI mainstream cards are definite contenders.