Nice efforts. Can you explore two text related biases that I have:
1) Space all letters and numbers in "PUBLIC47" equally
2) Align the A from ARCHITECTS with the P from PUBLIC; align the 7 and the S.
3) Prefer 7's that don't have an arched trunk
#195 is interesting, but looks a little like an arch--very classical architectural reference, but we're a modernist firm.
#193 looks a little corporate for my taste, and I'm not a fan of the slight shadow that the disk is casting.
#188 Pretty nice, but wish the vertical line didn't fade out.
Good luck!