We live in the Northwest, Silver Oak's area. My husband drives to Lackland, AFB everyday, it is about a 25 minute drive, its fairly quick. The schools in this area are great!! I wouldn't want to be anywhere else in San Antonio. Alamo Ranch area (kind of pricey) and anywhere north is a great area to have kids. The schools in this area have really great ratings. Check out their website, NISD.com. We were living in the 78254 area paying 1300 for a 4 bd 2.5 bath with a loft, in a great subdivision off of Shaenfield Rd. Very nice, but affordable area.
Just a warning, stay away from D' Ann Harper Coldwell Bankers Realtor, their property management is Horrible and they are NOT PRO MILITARY. We rented with them when we first moved here and had a really bad experience, they are very unprofessional. Good luck with your search. =)