With every type of product there's always a particular brand or SKU that rules the roost, that pushes the boundaries in terms of quality and performance. In the world of desktop computer memory there are a few of these: Corsair's Dominator Platinum and G.Skill's RipJaws are a couple of examples but...
Best-in-class performance; Great looks and high quality construction; Lifetime warranty
Very expensive; Tall heatsinks may cause compatibility issues; High frequency doesn't scale in many real world applications (at least not yet….