Well, you're comparing apples and oranges here...
ti4600s were designed for optimal game performance and DirectX functionality. But people realized that this was also a great card for doing stuff in 3D.
On the other hand you have the DCC which came out last year. Designed mainly for 3D content creation. Which means it can handle more hardware particles, wireframe deformation on heavy models in real-time with textures showing in openGL etc... for twice as much.
These more expensive cards are assumed that people will buy them in companies for their employees etc... hardcore users. Whereas, the other was for the general public. You have to decide what bang for the buck you get.
For me, The performance of a card comes first... then the price comes second.(How much can this card do for me?)
That being said, I would actually recommend a different card. It is fresh out of the market.
The ATI All-In-Wonder RADEON8500 128 $399.99
I myself was going to get a ti4600 but i dont have that cash right now. So I used my friend's computer, and he has the Radeon 8500 64DDR. This card was handling wireframes up the wazoo(very fast) plays DVDs and games awesome. So I got the Radeon 8500LE 128 for the same price. $199.99. I work with scan data, which is the heaviest wireframes out there... and I must say I am extremely happy with this card for my investment. It even rocks with Combustion and After Effects. I'm sure I'd be happier with the ti4600. But like I said, bang for the buck.
The reason why I recommend the
AiWRadeon8500 128 is because of it's 2D and 3D power for what you pay... The same price as a ti4600, and it's targeted for A/V as well as Games. Not just games.
The ti4600s beat the 8500 when it comes to low detailed graphics... but when you raise the resolution, and increase monitor resolution, the 8500 is not far behind the ti. You can even hook up your dv cam and tv to the card.
If money is not an option, then get the Quadro4 which is in the $1000 price range.
http://www.sharkyextreme.com/hardware/vide...cle.php/1013941