Research MBA Programs

Hi ,

In all the blogs, posts, I can see only reviews, rankings of the top 20 B schools. But there are no information about the state universities in the US. I have 2 years of work experience in IT industry and I am still working. I have booked for GMAT on August,17 and I hope to get a score between 650 and 700. I have short listed the following universities,

University of Wisconsin Madison
University of Iowa - Tippie school of management
Texas A and M University
University of Massachusetts Amherst

But I cant read anywhere regarding these universities. Please brief me on the following questions so that it will be easy for me to carry out my decision.
How feasible is it to get in to these universities?.
Is selecting a state university a good option or only the top 20 B schools are worth for doing a MBA?GMAT score needed to get an admit, and please comment on the recruitment opportunities after graduating in these B schools.

Thanks and regards
Siva