IMHO after consulting other pc gurus,Inno3D's FX 5200's advantage is its price, but is severely crippled by its 64-bit memory bus.
When considering things at a wider perspective, the GeForceFX 5200 seems to be lost. While it is a good value card, it faces stiff competition from the Radeon 9100. While the FX 5200 cards boast of DX9-features, its speed for the current games probably won't be able to run the "newer" games. As much as people would want a DX9-ready card, the FX 5200 isn't a very good option for that.