Ask HN: What mechanical (dvorak) keyboard do I buy that won't annoy officemates

I am anticipating a move from a work-from-home sort of lifestyle to a work-in-office existence. I love (LOVE) my custom Unicomp buckling springs keyboard. However, it's quite loud. I'd love to have something with a similar-ish tactile feel, but that doesn't assault my colleagues' ears.

In summary, what would you buy today if you wanted:

1. Mechanical keyboard action 2. Quiet 3. Dvorak layout in hardware (nice to have but not critical) 4. Not ghastly expensive