Need help with video editing card

Hi,

I am looking at an Asus 2 Core Quad P5Q3 mobo (not Deluxe?) and a Intel 8200 CPU as they come recommended for video editing.

It will be for editing video but I am a little spooked about the graphics card choice. I import DV via Firewire and analog via a vonvert box then firewire. I am not into HDV yet but could be in the life of this card.

I was looking at either the

1GB Radeon 4850 Gigabyte at AUD $272 (cheapest in Sydney Oz) or
1GB 9800GT ECS Gigabyte at AUD $239

Only spec I need is 2 monitors and the better card for the board and for editing.

It has been suggested I do not need 1GB and that there are even cheaper cards to do the job.. But what cards is my question?

Can anyone offer an advice please.

Even a cheaper card if possible as I am on a meager budget during these leaner than normally elan times!! :-)

oz