Pawel,

I went right from the Mach3 to the straight razor. I also purchased the strop and the hone. It is more work then the disposable but being able to hone your own blade is a rewarding experience. In addition you never run out of blades with a straight razor. . You can also consider purchasing a razor from a member of the group this way you know it will be both good and sharp.
Where in Poland are you from?
My grandfather came here in 1915 from Warsaw