the form, weight and price make this head appealing. i consider the miller ds-10 the bar for a tiny, lightweight head, though it has the disadvantages of a hefty price tag and being fixed to a 75mm half-bowl. but it just feels great to me. i'm not a huge fan of the 501hdv, or even the 503, so if the s6 is a lateral move from a functional standpoint, i think i'd lose interest quickly. i'm going to give one of these a try once b&h has them in stock again, but for owners of the s6, would you consider it a better head than the 501hdv?