So no suggestions on AM3/PCIe upgrade? :/
AM3/AM3+ is pretty dead as a platform and offers little in the way of viable upgrade paths going forwards. The newer multicore cpus seem to perform badly on DFC due to poor single thread performance. So my advice would be upgrade to intel if your planning on spending any money. Its not worth dropping more cash on an AM3+ system IMO at this point.
However all the gfx card advice above applies to an AMD platform just as much as it does an Intel one.