Where in WI are you? If you're not far from the Minnesota border, I know there's the Mayo Clinic somewhere in MN. I've never been myself, but being Mayo, they have a good reputation. I live in Madison and see Dr. Soni at UW Health (UW Hospital & Clinics system). I wouldn't really recommend him though - I've been ill for nearly 3 years now and am still technically undiagnosed (although, to his credit, I am currently in remission as he treated me with Entocort and Asacol). He isn't the best doctor, he isn't easy to get ahold of quickly and he sometimes goes on crazy whims, like he'll suddenly decide for some reason to change my meds or whatever, I'm not a fan of that. For awhile I thought I might get a second opinion from a different GI, and I still might in the future. I did a bit of research, not much, but Dr. Saha at UW Health sounded promising to me. I'm not sure if you're male or female, but if you're female, she might be a good doctor to look into. Her little blurb talks about her work with IBD in women, here's the link:
http://www.uwhealth.org/findadoctor/profile/sumona-saha-md/8274
I hope that helps a little bit anyway. If all else fails, check with your insurance provider and see which GIs in your area are covered, then do some googling on those docs to try to narrow things down, that's how I came across Dr. Saha. Good luck!