Savage is confused. There still is no special DC DDR ram. The sets that they sell (both OCZ and Corsair) are simply regular modules tested together to make sure they work together. There is NOTHING different besides testing and packaging between these 'magic' sticks and regular DDR ram.
As I have said above, the nforce2 boards are a little picky about ram. Now sometimes you may get 2 identical sticks, and find that they do not work together. This is rare, but it can happen. You will have to RMA the ram and try again. Usually 2 sticks from the same batchs will run together, and it is VERY UNCOMMON if they do not.
If you wanna pay $100 more for ram thats tested together go ahead, but I wouldnt recommend it. Your chances of it not working are slim, and if it doesnt, youre only out a few $$$ to ship it back in an RMA.
And actually, there is no guarantee that the DC packaged ram will even work on your board. I'm pretty sure they both use the asus A7N8X delux for testing, and one or the other (forgot which) uses an intel granite bay board as well. If your board is not that asus, then you might as well buy regular ram.