I've been using a Muhle R89 Old as my daily shaver for about a month now and I love the aggressiveness. The problem is that I have been using the inferior "vertical" Derby blades, they do the job but I know I could do much better in terms of smoothness. So what blades do you guys recommend using with this beast? There is a good chance that I might be going to China next month so I wanted load up on blades but probably won't have time to do a sample pack. My apologies if this has been covered.