"Must Have" razors

[97Widerider]

1940s Super Speed
A triangle slotted Tech
A NEW
An adjustable
A modern Zamak razor like Merkur or EJ

Interesting, exactly what I have

 

[Haggises]

An Old type. They're cheaper than the NEW these days thanks to the constant plugging of the NEW here.
A NEW Long Comb
A 40s SuperSpeed
A Slim or Fatboy Adjustable
A Tech (someone's got to like them....)
An Every Ready or GEM 1912 single edge
A Schick G or I injector.

Then when you've figured out what works (at least two years) concentrate on the good stuff, or just become master of all.