Best hospitals for RN's in Chicago area

I recently completed my BSN (LPN-BSN in December) and am working in a general critical care unit. I am planning to cross-train to the emergency department as well. I hope to move to a warm(er) climate after I have completed a year or two at this hospital. I am looking for advice about screening criteria for the next employer. How do I "screen" potential employers? There is no rush - I am learning so much in my job and enjoy what I do, but again, I want to live somewhere warmer (I live in ND) when I get that all important first year of RN experience. I worked for 10 years at a hospital in the western suburbson the administration side and am interested in how to 'interview' a hospital from the clinical perspective.