I have just ordered a gillette Fat Boy and Supper Speed, and I wanted to know what blades mats people use with theese razors. I have read where some say that Feathers are good in a Merkur HD, but very rough in a Gillette SS. Also, have read even some who say US personna are great in Gillettes I know that in an HD they are not good. Please list your blade preferance with your particular razor.