I've been using the the cryogentically tempered razors from greatrazors.com. Specifically I use their modified Sensor Excels, and while their technology sounds questionable to some people, I am absolutely convinced the blades last up 2 to 3 times longer (I get about 20+ shaves out of one; and I have pretty tough growth).
Been a customer of their's for at least six years. Regularly I try other store bought blades (Sensor Excels and Mach 3's), and my results are consistently re-confirmed.
Of course, YMMV.
http://badgerandblade.com/vb/showthr...-Frozen-Blades