I am also very interested in the medical aspects of SLP which is why I applied to both Northwestern and Rush. First off let me tell you that both programs are excellent choices. I did not apply to Midwestern, but I did apply and get accepted to both Rush and NU and toured both programs. (I had a 3.9 GPA)
My visit to Rush university was extremely impressive. Rush appeared to be medical based. The classes and most of the program take place at the hospital so if you are looking for more medical experience/exposure you would for sure get that at Rush. During the visit day they discussed the logistics of the program and they did mention that they have school placements, but to me it didn't seem like this was a huge emphasis for the program as a whole. I think a lot of people who apply to Rush aren't necessarily looking for school placements anyway since it does come off as such a medical centered program. Rush also gives you six clinical placements during the grad program which is a lot compared to some other programs. To me it seemed as if I could get a lot of different experiences. Also, being in Chicago allows for a lot of off-site clinical opportunities, and with Rush being a well known program in the area, a lot of the students do placements in different Chicago facilities including hospitals, clinics, schools, rehab centers, etc.
I went to visit Northwestern a week after visiting Rush which was great for me to compare the two programs. Again, I was extremely impressed with the program at Northwestern. Aside from the beautiful campus, the SLP facilities are brand new and high-tech. Northwestern is ranked in the top 5 SLP masters programs and after attending the visit day I completely understand why. The faculty members are extremely skilled and diverse in their SLP backgrounds. They seem to be very passionate about their work and research which was important for me because I am interested in continuing research. Northwestern has a lot of connections within the city of Chicago as well as the surrounding suburbs. The clinical opportunities provided by NU seem to be top-notch. The program seems to be well organized but also allows for personalization (ex: if you want to pursue a more medical based SLP career).
Northwestern and Rush are both expensive schools, with Rush being somewhat less expensive. However, I received a scholarship from Northwestern and not from Rush. I think either school would be a great option if you are interested in pursuing the medical side of SLP. I chose Northwestern because I found it to be a better fit for me in terms of what it offers both on and off campus. Good luck with your application process!