HR is a nice place, lots of kids, rather homogenous. Superior is nice, lots of kids, rather homogenous, but much smaller. You really can't go wrong with either choice. However, for the commute downtown, Superior has a great express bus service straight downtown. There are also HOT lanes that you can pay to use, again, straight shot downtown.
Just FYI Texas has very high taxes compared to CO. So home prices seem high, but once you figure in the tax payment, its not so bad. For example a house that is $200K has taxes of roughly $1500/year or $125 a month. In Mesquite it would be roughly $5000/yr. or $417 a month. With the extra $300/mo that you will save in property taxes, you'll be able to afford $30K more in house.
Welcome!