I'd love to try a roller mouse myself but they are really expensive.
Love my CODE keyboard. codekeyboards.com/
I am quite fascinated by the mechanical keyboard trend. I find them to be quite noisy, but maybe that's just because I haven't tried one out yet.
It depends on the switches a keyboard uses. Some are louder than others. And you can get some sound dampners for them as well that cuts the noise (at the expense of some key travel).
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