Cos PCI gfx cards are now 'old tech' they can cost more than the newer PCI-express cards, just like how older types of ram can cost more... so yeah it may be more cost effective to go for the newer PCI-e cards, I would try looking for an Nvidia 1gb card with 2-3 HDMI outs, like Andrew said you should be able to find a few good brands under the 100 bucks mark.