Performancewise, the Ti4200 is actually comparable to the 9600 Pro is some respects (ie. withouth Anti-Aliasing, Ansiotropic Filtering, Pixel Shader 2.0/Vertex Shader 2.0 functions) performance wise. But if you enable AA or AF, the Ti4200 goes to pot because it shares some trasistors on one of the vertex shaders that are used for AA & AF some reason. I may not be compeletely correct, but its something along these lines. But that's if your just nuts for an Nvidia card.
Theoretically, the FX5600 Ultra is "<i>supposed</i>" to be a competitor to the Radeon 9600 Pro, but only manages to compete well in Direct X 8 games like UT2k3. So, what that boils down to is in mroe advanced DX9 games like the New TOmb Raider Angel of Darkness and the Upcoming Half-Life 2, which are both DX9, the FX cards will not be able to hold their own.
WHat's most embarrasing on Nvidia's part, is that the $500 GeForce FX 5900 Ultra card can sometimes be crushed by a $150 Radeon 9600 Pro card, & I'm not lying either.
Normally, I would post an alternative brand's product to each category but today, Nvidia doesn't seem to offer anything competive except for the Ti4200, which they don't even manufacture anymore.
My OS features preemptive multitasking, a fully interactive command line, & support for 640K of RAM!