Well I'll just tell you what I think about each of the items that you listed and hopefully that will help: (DISCLAIMER- keep in mind that this is my personal opinion)
Cost and reputation go hand in hand. Let's say that you only got into to med schools and they were UPenn and Kentucky and that you are a Kentucky resident. UPenn is more prestigious, has more opportunities, better ranking, etc than Kentucky. But Kentucky's tuition is almost half of UPenn and in this hypothetical scenario, you don't have scholarships or parental support and you have to take out max loans. That would be a decision that only you could make on whether it is worth it to go to a much higher ranked school and have more loans or to your state school.
Location is kind of important and might help lift up your spirits during med school drudgery haha. For example, let's say I got into Case Western and a few other med schools. Case is a great school, but I really really dislike Ohio and the Midwest in general so I would cross it off my list. That's just how I feel about it. Also, it depends on how close you are to your family. If you guys are close, then going to med school in your home state or within ok driving distance would be nice for you.
For research opportunities, yes the top 25-30 med schools will have good funding and research based on their rankings, but so do the rest. Research is an important part of med school if you want to try to get matched into a competitive specialty so all med schools will be alright in that regard. I wouldn't really use this to pick a school.
As far as clinical exposure is concerned, I highly recommend asking your interviewers (or older med students if they are available) about the MS3 and MS4 curriculums. All med schools will teach you the same thing in essentially the same way during your first 2 years so it is important to find out how the clinical experiences differ based on the resources and facilities of that particular school and the strengths of their departments (whether they favor primary case, specialization, or both).
Style of grading- Pass/Fail during preclinicals rocks! Also, I prefer traditional non-mandatory lectures over PBLs or mandatory lectures but I also don't go to class at all so that may or may not work for you.
I really hope that I was helpful. Good luck!