aren't they loud? i dont think my coworkers would appreciate it.
Even a loud keyboard generates sound in a pretty narrow frequency range and in a pattern that quickly becomes "white noise," ignored with relative ease because your brain isn't constantly trying to decode and evaluate it. Not true of most other commonly-encountered cubicle-farm sounds, which tend to be indulged with little complaint.
People stand in the aisle and chit-chat about some dumb road-rage maneuver they pulled, or the latest UFC battle, or politics (same thing); supervisors walk by and pop in randomly to ask about TPS reports or dump some new emergency; adjacent cubicle-dwellers make personal calls and curse their malfunctioning computers...
Anybody who seriously complains about keyboard noise is almost certainly guilty of far greater levels of disruption than you and your keyboard. Rare is the cubicle environment where even a Model M on full report generates enough volume to truly drown out or be overheard in the business phone conversation in an adjacent cubicle -- and any other objection is just whining.
Put a rubberized placemat or similar under your keyboard to lessen the desk resonance if you're worried about it.
Or, find a friend nearby and sell them on a mechanical keyboard. It probably helps when you're not the only one in the neighborhood.