I picked Rho 4 Life b/c for me, SGR is a lifetime commitment, and like serious sigma, I take the terms of the commitment seriously.
And 4 was my line number
I went with Rho instead of Sigma, b/c there are a fair number of orgs out there that describe themselves as "sigmas", but I haven't heard of anyone else being called a "Rho", or at times "those Sexy Rhos!"