I've been watching and researching (and renting) comparable housing to what you may be considering. All things considered (cost, convenience, crime, etc. and not expecting perfection), Lakewood and Arvada may be your best bets.
Specifically, N/W/NW portions of Lakewood and Southern parts of Arvada. The key is the garage, which I've also been trying to get (especially an attached garage.) Those two areas have roughly the age of housing that gets you the right combination of price and features: independently-owned/-managed duplexes and townhomes/condos built in the late 70s to mid 80s.
Obviously Craigslist will be your primary source but check out Padmapper.com, it has some good tools like driving distance by time (I enter 10 minutes less than my ideal based on my experience for traffic and weather.)
You want to stay away from driving I-25 at all costs. Especially travelling towards downtown Denver at rush hour.
As always, "caveat emptor", "if it seems too good to be true..." and all that. (There seems to be a concentration of scam housing listings around Sloan's Lake for at least the last couple years.)