I can say with certainty that El Paso County is moving northeast with expansive growth. The development of the area you are referring is planned about 17 years out. New construction permits have dwindled in the current market, but most of the major developments (residential and commercial) in El Paso County are happening in the vicinity of the area your are referring to.
In terms of buying, your specific needs and time frame will have to be evaluated. The current market is extremely volatile and we are definitely in a buyers market. The area you are referring to is swamped with new construction and new construction does put heat on resale homeowners. Thus, if you are thinking about buying in this area ensure you have someone advocating for your best financial interest.
If you are interested I can email you a November 2007 housing study for El Paso County.
Best of luck,
Lynn911 Dallas Realtor & Consultant, Loan Officer, Credit Repair Advisor
The Michael Group - Dallas Business Journal Top Ranked Realtors