What is the best PEO?

There is no one solution.  Every company's needs are different and there is a PEO, or professional employr organization, that fits just about every industry.

Some PEO's are stronger in terms of benefits, others have industry niches that they can parlay into a dominant position in the market.

For instance, there are a handful of PEO's that work only with transportation and trucking companies.  Due to the variant needs of this industry and the additional compliance issues that small trucking companies face.  A PEO saves their clients thousands in reporting costs and potential fines or worse. 

History Lesson on PEO and Employee Leasing

Here are the Wikipedia definitions of PEO (professional employer organization) and Employee Leasing.

http://en.wikipedia.org/wiki/Professional_employer_organization

http://en.wikipedia.org/wiki/Employee_leasing

Here is what Entrepreneur Magazine has to say:

http://www.entrepreneur.com/encyclopedia/term/82362.html

My definition?  It is a business solution that allows small to mid-sized companies to compete with larger companies by offering shared expertise and services for human resources functions. 

Where do you go to find a PEO?  Start with NAPEO (http://www.napeo.org/) or PACE (http://www.pacepeo.org/).  You should cross-reference with your own States Department of Labor, to be sure that the provider(s) you are considering are fully licensed.  Or you can engage with a consulting or brokerage company such as National HR Companies (http://www.nationalhrcompanies.com/) or HROplus (http://www.hroplus.com/).