I think putters must be the most personal preference club in the bag. Once you find one that really works, its hard to change it. I have had only two, the first being an older style PING Anser 2 blade. I still have it and occasionally bring it out. I actually won the clubs putting competition with it, so it holds a special place.
The other, and currently in the bag, is an old Carbite Polar Balanced blade. I bought that for my son as his first putter and have kept it. It has a really nice weight to it.
So maybe that makes me a rotation player between the two!!