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What about going for the VisionTek Xtasy GeForce4 Ti4600 Video Card for $400? This card is for gamers but I just wonder how it would stack up to other high-end workstation cards? >>
It would certainly perform respectably, but there are far better CAD/3D Modelling options available at a similar price point... given that you already have a Quadro 2 Pro, I can't see a GF4 Ti4600 as being a very significant upgrade for you outside of the gaming applications in which the GF4 thrives.
I find it difficult to recommend nVidia so long as Elsa is going down, because nVidia has in the past relied heavily upon Elsa's experience in the pro segment of the market and Elsa engineers helped tremendously with nVidia's driver support for the Quadro series.
On the other-hand nVidia boards are extremely well suited to 3D Studio Max, though much less well suited to AutoCad.
Also, given that the Quadro DCC isnt a significant boost over the Quadro 2 Pro your already using I'm not sure it's worth the upgrade for you... especially since drivers are still somewhat iffy for the Quadro DCC.
ATi has yet to prove definitively that the FireGL8700/8800 can truly match up in the CAD/3D Modelling areas their aiming for and they've had some issues getting ISV certified, so I'm reluctant to recommend those either.
performance is quite good and their very versatile cards. The FireGL 2 is the only one of those under $700 though, and isnt dramatically better then your
The FireGL 2-4 have extremely good drivers, and the FireGL 3/4 would be decent upgrades over what you already have. Driver support is top notch and current Quadro board.
Finally we come to 3DLabs, and their below $700 models are difficult to recommend. The WildCat II 5000 at roughly $800 would be a respectable upgrade if you can stretch your budget a bit to cover it.
As your looking to purchase these boards for a company I certainly would NOT recommend buying and hacking a basic GF2 Pro/Ti that rogue1979 has mentioned. Besides that I doubt your company would be terribly pleased if they were to get into some legal difficulties due to their usage of illegally modified graphics card in a production basis.
For home usage hacking those cards is viable, in a company using those cards in a professional manner I wouldnt dream of recommending someone do that.
Beyond that you can see my opinion opn the Quadro 2 Pro/Quadro DCC above.
Personally, if at all possible I would recommend waiting.
If you
must buy now or in the near future, then the FireGL 2, or 3DLabs WildCat II 5000 seem the best option.