Mid Tier Schools for Biological/Biomedical Sciences

I am currently in the process of applying to graduate school (PhD), and so far have found several top schools with great research, but am struggling to decide which mid-tier schools I should apply to.

My undergrad GPA is around 3.9, and I have two summers and two academic years of significant research experience. I am a decent writer, but I am worried about my letters of recommendation since I have heard they have a great impact on your application.

Any advice on mid-tier schools with decent biomedical research?

All of them?

Narrow down what your interests are and go from there. Check with the faculty at your school as well.