Macro lens for Sony Nex: SEL30M35 or Vintage/Legacy manual focus?

Hi,

I would like to purchase a macro lens for my Nex-5.  How good would vintage/legacy manual focus macro lenses be on the NEX as opposed to the AF SEL30M35?

What vintage/legacy manual focus macro lenses do you recommend?  What about the following:

• Canon FD 35-70 mm macro zoom lens
• Canon FD 28-55 mm macro zoom lens
• Canon FD 50 mm f3.5 macro

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Sony Nex-5, 18-55mm Kit Lens