All companies, as long as it is Nvidia GPU, will support SLI. I recommend EVGA if you are going to be overclocking and/or installing a different cooler eg. waterblock onto your GPU as their warranty is better. Asus has the best components, but their warranty does not cover removing the stock cooler. MSi has decent-quality components and same warranty as Asus, but is much cheaper than the two mentioned before. I personally dislike Gigabyte for their massive coolers and in-efficiency, but they are a reliable company.