Not sure that I could recommend anywhere. I've heard good things about
Mount Sinai's GI dept.
I'm trying to get a referal there myself. Just wondering, are you Canadian or American?
There is a clinic in Buffalo called Buffalo MRI, that gets alot of referals for Canadians, but I'm really not sure how reputalble they are.
Not sure why you were told that MRE will not show the bowel, as this test seems to be taking the place of a CT due to radiation issues.
The best test for you will likely depend on where you're having issues. I would think a colonoscopy/endoscopy would still be the best way.