The PowerColor Radeon X800GT that 3DVelocity reviewed has 256 MB of DDR3 memory, and a 256 bit wide memory pipeline.  It’s a PCIe 16x card, that might be perfect for you if you are looking to make the jump to PCIe, without paying a lot just in the videocard.  Plus, it performs well enough that you may be able to keep it in your system longer than you might expect from a middle of the road card.
“It’s important to remember that mainstream users aren’t people who don’t want powerful graphics cards, they’re people who don’t NEED powerful graphics card. Give them the option to equip their systems with a polished, pixel-pushing games monster without them having to sell a kidney on eBay and you can bet they won’t say no.”

Here are some more Graphics Card articles from around the web:

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