I used a Zalman VF950-LED cooler with MX-2 on my 5770. The mounting holes line up perfectly. Also, I have the original PCB with the GPU socket closer to the mounting bracket and it still fit without conflict. I used a Zalman 7V fan cable and it kept the card at 38°C at idle, and below 62°C at load (using RTHDRL full screen, which I've found generates the highest load temps other than furmark or similar). Also, the cooler run at 7V is silent inside my case with 1 S-Flex E fan on the CPU and 3 S-Flex D fans attached to a P180B . It makes for a very quiet system.
This cooler works well, is well made without any uneven fin spacing, and mounts extremely easily. The Zalman VF950-LED is highly recommended.