I am new to Massdrop but I see Foreverspin has done a drop before. I own the Titanium, Bronze and Cast Iron foreverspin tops. They don't have the long spin times of other tops on the market, but I love their simple design and textures. I think I might just have to join this drop to see what else I can add to my collection. BTW, the really smooth, shiny ones might look great, but they are much harder to grip and spin.
I recently picked up the Prometheus Lambda top. It's smaller than the foreverspins, but it spin so nice. Great grip and spin times at 10+ minutes. Other than that, just keep an eye out for tops with better grip at the top and a ruby or similar contact point.