Culture shock, yes. The British accent will be a novelty for many people down here, but shouldn't be taken as derogatory. Prattville or Wetumpka would probably be my first choice if moving to Montgomery. My best friend grew up in Montgomery and I don't mind relaying any specific questions regarding schools or housing to him.
As previously mentioned, the Shakespeare Festival is in Montgomery... culture does exist outside of Alabama-Auburn football, deer hunting, and Nascar. There are a couple of glider clubs within about an hour's drive north of Montgomery so you can get an aviation fix away from work.
When asked "Alabama or Auburn" just reply "Alabama, 12 National Championships baby" and watch the jaws drop... you're not expected to know anything about it. Like I said, you'll be a novelty but let us be a novelty for you as well. We're generally fun-loving folks.
I grew up in Birmingham (Alabama not England) and seriously doubt we'll ever move out of the South.
Be prepared to not buy beer or liquor or wine on Sunday (even in restaurants), it depends on the county where you live. There are still a couple of dry counties around here.
You will likely get strange looks if you go into a restaurant and ask for bangers and mash.