Which double edge razor blade gives you the best overall shave?

Derby Extra

Dorco Stainless

Feather Hi-Stainless

Polsilver Stainless

Polsilver Super Iridium

Wizamet Iridium-Super

Gillette 7 O'Clock Blue

Gillette 7 O'Clock Yellow

Gillette 7 O'Clock Green

Gillette Silver Blue

Kai Stainless

Lord Super Stainless

Shark Super Stainless

Lord Platinum

BIC Chrome

Merkur Super

Wilkinson Sword

Bolzano Superinox

Personna Lab Blue

Personna Med Prep

Personna Double Edge

Personna Israeli

Personna Israeli Red

Astra Superior Platinum

Trig Silver

Treet Classic

Treet Platinum

Super-Max Titanium

Super-Max Super Stainless

Astra Stainless