A deep milled face such as the new California series has would be the best. I feels softer than any other face and gets the ball rolling faster than any other face. Milled faces and smooth faces have a harder feel and don't grip the ball as much which can be a problem with long puts ( skidding) . It mostly on personal preference. I have a milled face putter and still wish that I had waited and saved up to get a deep milled putter. The type of ball you play also plays a factor in feel. Overall the deep milled putter would be your best choice because it gets the ball rolling a lot faster.