For me, the dissatisfaction is with the imprecise clustering of people and ideas, not with the name, and a bit of dark-arts worry that anyone thinks a name is necessary/important/helpful.  

Can you define the group that you're trying to name (or asking to name themselves)?  I share some attributes and enjoy discussions and learning about related topics, but it's not a big part of my identity, and almost none of my social activities relate to this group.

Also, please describe the purpose of the name - is it to intimidate (or gain respect/status from, if you prefer) the mehumes, so they'll take you more seriously?  Is it to attract neophytes to the group?  What functions does "rationalist" not serve, and why expect a different self-selected label to work any better?

Perhaps this should be done via survey, with questions like:

• Are you an empiricist?