The previous advice offered by my fellow SRP members on de blade purchase is right on the mark.
Get a blade sampler pack from an online vendor that contains the brands that they have suggested.
I used to swear by Wilkinson and Personna (blue) razor blades, but not anymore. Now the Gillette yellow and blue pack de razor blades have become my favorites.
If you want to know where you can get sampler packs, pm me. I know of at least two vendors who offer them in a wide variety at a reasonable price.