The 7870 is a great card. Just be careful choosing one, as some are over 9.7" long.
Also, just to reiterate, this card is a good investment for the future, but with your current CPU you will not see the performance you may have seen in reviews. If you don't have serious plans to upgrade, I think the 7850 is probably the better value.
Just ordered the Sapphire Radeon 7870. Thank you all very much for the help. I believe this looks like a decent card. I've been without a graphics card for 2 1/2 years so might as well get a good one . Here is the link:
http://www.newegg.com/Product/Produc...82E16814202025