#6 - I like the profession feel of the logo, but the large C is misleading. Maybe change the stars to mountains or the Colorado flag shaped like a mountain.
Can you outline Longmont in red, make the mountains with a solid blue on top and bottom instead of the sblue shadow, maybe relocate the stars outside the mountains, or insert a shadow like #6. Also would like the mountains a little smaller so they don't cover up the M in Longmont.