There is so many different ones that I have hard times choosing the best bang for buck. I'm not planning of doing some EXTREME overclocking. Some yes but nothing that air cooling wouldn't handle. I'm doing 3d work so speed for rendering is the most important so also RELIABILITY. I really don;t want to pay for something that would be overkill. So wchich one to choose? 32Gb Vengeance ? But there is red one (CMZ32GX3M4X1866C10R) and black one (CMZ32GX3M4X1866C10). They have same timings but what is this R stands for in red one? The price is also quite bigger on those. Please help guys.