I lived in Denver for 3.5 years, and as i've mentioned before, the traffic is contemptible.. my insurance also sky-rocketed when i went there. the roads aren't set up to handle the buttload of ppl that have decided to move there from LA. so if you have any sort of commute at all... bad news. i lived on the south edge of denver & had to commute 7 minutes further south to get to work... 7 minutes on a clear stretch of highway, that is.. 45 minutes - 1 hour during rush hour, which is nearly every hour except 3am. There are parts of Denver that are better than other parts, but if you have to travel on I-25 on the south end of the city, it's *really* bad. I had another job where i had to drive toward the center of the city, and that wasn't as bad... but still not good.
the weather is unbeatable, though, (300 days of sun) and so is the scenery. Denver is less yuppyish than Colorado Springs, but if you're a true forward-thinker or a beatnick, you might want to consider Boulder. it's tucked right in the foothills, 30 minutes from Denver... (precluding rush-hour travelling, of course).
the local vacation options in Colorado are limitless. there are *so* many things you can do with your weekends.. things that only require a 20-minute to 1-hour drive into the mountains... up to 5 hours depending on your adventure level. It's very hard to get bored in Colorado.
i always heard locals telling stories of coming across rattlesnakes, which freaked me out, but i never saw any myself.
Fort Collins is also a *beautiful* city. kindof small, but very pretty... and again, right by the mountains.
Cost of living really couldn't be better, other than the car insurance burn. rent there is slightly cheaper than it is in Minneapolis, and it's 100x cheaper than it is here :-/.
Also, it's a dry climate, so cars don't rust there. and neither to ppl.