Picking a Putter

For the Stock Tour Swing putting stroke, what would be the best putter to buy? I feel like there are a few different options to consider (see below). Hosel Options: Toe Hang Face Balanced Center Shafted Head Type: Mallet Blade Face Type: Insert Milled Both with varying degrees of hardness and softness Grip: Traditional Superstroke-type large grip Length: Between 33-35 inches for traditional Then there are belly putter and longer options Weight: Many putters now come equipped with weight kits to adjust the putter weight. Are there any other potential features I'm missing? I feel like pretty much everything above is personal preference, but that there may be some research on the best hosel type. Thinking through it, it would make sense that center shafted would produce the best results because the face would rotate the least. But perhaps that too would be personal preference. I'd also guess that firm faces would be preferred to soft ones; not that they necessarily produce better putting by themselves, but the feedback provided by the firmer face would lead to better putting over time. So, is there a best type of putter for the Stock Tour putting stroke? Thank you, Nick