The cheapest 2x4 GB kit should work. The mem modules listed in any motherboard documentation are the ones the company took time (or pain) to test and check if it posts or not. There is always a possibility that they might have dropped/forgotten a few.
For example, a long time ago (like 4 years or so) when I was buying stuff for my build, I got a motherboard that could support up to 1066 DDR2. I got 2 x 2 GB Kingston mem modules ~800 MHz but somehow it didn't work. One BIOS upgrade later, it worked. The Kingston RAM sticks were not listed in the MoBo's documentation.
Still, if you don't wanna risk it, try finding RAM sticks that are actually listed in your MoBo's guide rather than finding out if the RAM sticks available to you are supported by the MoBo. I know that the Corsair and G.Skill are superior to cheaper (let's say simmtronics or the hynix modules) and more easily available RAM modules in the India market, the cheaper ones simply tend to work out nicely. This means that you have to go out in the sweltering Indian summer heat for all this, but the effort will be worth it.