Far BETTER and FAR cheaper than any Quadro or FireGL would be a MATROX P series. If dell doesn't offer it, buy it seperately. Best choice for 2D and TV.
The P650 should do you nicely and the P750 would allow you triple monitor suport source/tools/output. Both of those cards would be cheaper than even the Q-FX500 which is a DOG, and a VERY expensive one at that!
Here's a run down of the Matrox cards.
<A HREF="http://" target="_new">http://www.matrox.com/mga/products/comp_chart/gseries_pseries_parhelia.cfm</A>
That would be the best solution for video editing, even if you had to buy the cards seperately. The cards you have listed are far too expensive for their worth. They are for 3D-animation more than video editing.
For the price of the Q-FX500 you should be able to easily get a Parhelia which would be the best pro-sumer solution you could get IMO.
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