That 6450 does look like it has lower power needs, and it is cheaper, but I am looking for a slightly bigger jump up. I will try the Sapphire 6570 card for this project and hope the power supply can keep up with that card and my friends moderate usage. At 40 bucks after rebate (Sapphire rebates are really slow) it looks like a good deal.
We also have a 745 Mini-Tower in use with the same X-1300 card in it. If this project goes well I would like to upgrade that machine too and I will probably give that 7750 card a try in that project.
Thanks again.