So far I've considered these:
Runner's World Marathon Plan
Hal Higdon's Intermediate 1 Training Plan
Rick Kimbal's Marathon Training Plan
But in searching for a plan, I've found that several plans come with a price before you can actually see what you're getting yourself into. I haven't actually gotten to the portion of Hal Higdon's book that states the plan, but I think it's included, so that would be a plus for going with his program.
If any of you have helpful hints or advice as to which program worked for you and why you liked it, I'm all ears! Thanks in advance!