I use the 4-bladed Schick Quattro. They can be bought at
NTUC.
I find it a lot safer to shave with than the Mach 3. I hardly ever
get cuts and razor burns while using the Quattro. The blades are
wrapped with thin safety wires which prevent the blades from
digging into the skin. In contrast, I'm forced to use aftershave
lotion every time after using the Mach 3.
Ah well, I guess I'm just not an expert at shaving even after so
many years of doing it. 