M.B.
Hi there! Being that I was totally new to the DFW Area - I found it hard to find any information on the towns at all.
I know that Lancaster is a HUB for lots of Transit Companies so you most likely will have lots of 18 Wheelers causing you some issues.
Cedar Hill had some really nice areas - that I liked - but I could never get any information on the over all feeling of the city itself.
We ended up right at 360/20 - in Arlington - but in Mansfield Schools (which are suppose to be the top schools in the area) and on the edge of Grand Prairie.
The AA Center - is right near where I work (InfoMart) and the drive that I take is easy to handle. 20 to 408 which merges to the 12 - to the 30 - then from there I jump off at Berkley and take some back roads to Oak Lawn/Industrial.
I can tell you that if you are buying - you will score a big deal due to the market.
Good Luck!
M.