Have you decided on a house yet?
Google Maps says 23 minutes from Arapahoe Lake to 17th and Broadway. But, I bet Google Maps has never been on the Interstate during rush hour. That is a heavily traveled corridor. I would add 10 to 20 minutes on a non-snow day. Evans, I-225 and Santa Fe turn into near gridlock during most drives. On a winter day with 6 inches of snow on the ground, you can encounter substantial delays. Turning off the freeway at Lincoln doesn't save any time, according to Google.
There's always light rail. Ride and walk or cycle to your downtown destination.
Denver needs more car pool lanes.
PML of Longmont, CO