Since I am an injector expert (translation - I had my first ever injector shave this morning) I will tell you what I found.
I bought Schick and Personna blades from RazorBladeRefills. As with any replaceable blade razor, I figure I will have to try blades until I find what I like. But I started with the Schicks and maybe got lucky since it was the gentlest shave I've ever had - nearly the smoothest too. I also have some Pellas on the way. Schicks seem to be liked here.
I have a Schick L1 razor;
"Would you mind not shooting at the thermonuclear weapons? "