Since my return to DE shaving this past summer, I have been testing 30 different blades to find the ones that work best with my face. It was not a totally rigorous test. I used one razor, the Merkur 34c, for testing but I did vary the soaps, which also have an impact on blade performance. I have a medium coarse beard, my face is not overly sensitive except in the usual spots on either side of the Adams Apple, and I typically shave three times a week. The ranking is how I perceived the performance and obviously may/will differ from your experience. Most of the individual tests were posted on the Shave of the Day thread and or on the Safety Razor Forum. Below is a photo of the blades tested. I ranked the blades into four categories: poor, good, very good, and excellent. The far left column are the "poor" blades. Within the column they are ranked best to worst. So the Derby was the best of the poor - if that makes sense. Merkur and the Asco Red were the worst of the poor. Both of these blades tore my face up to the point I had to take several days off from shaving to recover. I just cannot see ever using any of these five "poor" blades. The next column are the "good" blades. These gave decent shaves and in a pinch they work. Perhaps one would be sharp enough but not smooth enough or vice versa. For example - the Wilkinson. It gave me a very close shave but very rough on the first use. On the second use I it was far smoother. Sharp Durablade was the best of the "good" blades and the Dorco ST 300 was at the bottom. The next column are the "very good" blades. I could use any of these on a regular basis. These have potential. I wanted to like the Feathers, but I need to work with the blade a bit more (just too sharp for me at this point). I must say - the Dorco ST 301, for being so inexpensive, really is a very good blade. The far right column are the "excellent" blades. They all came very close to that sweet spot of sharpness and smoothness. The Polsilver Super Iridium is definitely the best of the best. The Astra SP was very close behind. The next three - Voskhod, Ladas, and Rapira Platinum Lux were all equally excellent. I really liked all three. The next 5 all could be in my regular rotation as well. It really gets difficult to separate them individually. They all gave me really close and smooth shaves without irritation with the first use. Next step - buy blades. I have placed orders for all the excellent blades. For the top five (notice they are all Russian), I will buy a bit more. I want to now try these blades with other razors. The rankings could change for any given razor. I have a new Muhle R89 standing by. So there you have it. Thanks for bearing with me on this adventure. I would be interested in your thoughts.