not sure what the link problem was - worked for me.... but here's the first article. The 5770 is newer than the Jan. ranking list from the second article...
ATI Radeon HD 5770 Review
By Julio Franco, TechSpot.com
Published: October 13, 2009, 11:05 AM EST
Last month AMD unleashed what went on to become the world’s fastest single-GPU graphics card by a convincing margin, the Radeon HD 5870. This was followed shortly by a slightly watered-down version known as the Radeon HD 5850. The latter has proved to be very competitive, playing second only to its bigger brother and at just $260, it stands without a doubt as the best value high performance offering available at the moment.
Continuing with the successful rollout of its Radeon HD 5000 series, AMD is now moving to attack the sub-$200 market, and hopes to keep the momentum going with the Radeon HD 5770 and 5750. Codenamed Juniper XT and Juniper LE, respectively, the first is said to cost just $160, while the lower-end 5750 will cost between $110 and $130 depending on memory configuration.
We've been particularly interested in the ATI Radeon HD 5770, as last generation's Radeon HD 4770 was one of our all time favorite budget graphics cards. Although it came late in the game, its excellent performance and operating efficiency earned it an “Outstanding” mark, making it the top choice in the $100 range. We certainly expect to see these new series live up to those standards.