Please take my opinion with a grain of salt. I'm not a mid westerner and I am used to warm weather.
I interviewed at Rush and Loma Linda. Between the two I would definitely go to Loma Linda. While Rush is in Chicago I just got a weird vibe from the residents. It sounds like they are overworked and generally not as enthusiastic about their program as the Loma Linda residents. The chief that talked with us was super weird too trying so hard to sell the program that clearly had a very bad reputation among applicants. Also the hospital is in transition b/c they are building a new facility that will be done after you are gone. That being said 5 year ACGME accreditation and you will come out of there a competent and capable anesthesiologist as they are very interested in your education (which is why they say they work you so hard). I would personally just be miserable there. But if you love the midwest go to Rush.
Loma Linda on the other hand seems to have happier residents overall. The location is not the best. While technically it is in SoCal its about 1+ hour drive away from LA. Loma Linda is a nice safe community if I had kids I think the town would be perfect. Loma Linda is a good launching spot to get to skiing and the beach but you gotta drive ... far. The hospital is nice and feels new and well kept, the ancillary staff are very nice (something to do with 7th day adventists being nice by nature). Its true that there is only vegetarian food there and <gasp> no coffee in the cafeteria. But the food was excellent (i'm not a vegetarian) and evidently you can find coffee pots hidden throughout the hospital. You get to do every kind of case in Loma Linda b/c it serves some of the poorest, fattest, drunkest, most violent areas in SoCal (inland empire). I got a the impression that the resident faculty interaction was positive and I like the PD and my other two interviewers. Residents seemed happy. Research opportunities are available although Loma Linda is not a research power house. Everyone seems to be into outdoor activities.
If it were my choice, Loma Linda without hesitation.