Larry Mudgett is based in Saratoga Springs, Utah. It doesn't get much better.

http://www.marksmanshipmatters.com/

Self defense is a multi-faceted endeavor.

Shooting is part of it...and training that will build the necessary understanding of handling a firearm under stress should be a priority.
Understanding the law is part of it...and learning that will build the necessary understanding of the legal issues surrounding self defense should be a priority.
Understanding how criminal actors work is part of it...and learning that will build the necessary understanding of how criminals act should be a priority.
Understanding how to recognize an impending criminal attack and avoid it entirely or at the very least put yourself in position for a successful counterattack should be a priority.

You can get the majority of those things covered, at least the essential basics of them, in a single course with Tom Givens who happens to be doing the traveling instructor thing full time now. Getting in one of his classes should be a priority. If you can't make it into a class with him right away, you can get his book and his Lessons From the Street DVD. Tom did a lot of teaching in Memphis and to this point over sixty of his students have used lethal force successfully without civil or criminal consequences. The only student that's lost a gunfight is the one who didn't bring a gun. Tom's program is tight, well developed, and damn good. Tom isn't the only guy teaching a solid program, but I know for certain that his program covers most of the bases on self defense very well and does so entirely based on good sense and provable results.

The legal side of things is more tricky...a good introduction to that would be Andrew Branca's book The Law of Self Defense as well as his seminars. He's even doing them online now, so check out his website, too.

That's a start.

There's nothing wrong with IDPA, but understand this clearly:

IDPA is not the same thing as training. It's better than nothing, but it is not formal instruction from someone who knows what they are doing. It's a decent method of improving skills but for most won't do a good job of teaching the foundational skills in the first place.
Marksmanship endeavors like IDPA do not teach you the other relevant areas of self defense like legal concerns, understanding criminal methodology, etc.

If you are serious about this, be prepared to get yourself into a quality course. This will mean travel time and expense. It is worth it.