Ceaser,
There isn't a bad school among them. Of the ones you named you have some outstanding candidates with excellent reputations:
UMass = instant name recognition, excellent rep. terrific business school.
Liberty = instant name recognition, excellent rep. (one of my favorites from my research)
I really think Peru state is the overall best "bang for the buck" degre. Inexpensive, RA, state school. Hard to beat.
Regent is a great school, a tad expensive but nothing compared to some.
Man, so many great schools I really think you've got some wonderful picks named. It's like who do you want as your quarterback? Joe Montana or John Elway....you can't lose.
Of course there are wonderful things about Ashford University as well, small school, personalized service, but then I'm a bit biased.
Walden and Kaplan may be okay, but last I checked the tuition was kind of high. I had a bad experience at Kaplan, but that was in a branch of their university that is no longer in operation.