I should have made this a poll. Here's the primary responses to date:
FP-10 (1)
Break Free CLP (1)
Rem Oil Aerosol (surface cleaning only) (1)
M-Pro 7 (3)
Gunzilla (3)
G-96 (1)
Hoppes Elite (1)
Everyone has their favorites and my experience is that most shooters can agree more religion and politics than about gun cleaning solvents
I'm leaning toward Gunzilla as it might be more gentle on blued surfaces... but that's just a thought