I know you want smaller schools, but you’d be remiss skipping Penn State and Pitt, both of which have terrific Neuroscience programs and are within budget.
Professors at Slippery Rock and other PASSHE schools are on a 4-4 schedule and have neither the time nor the resources to conduct much research.
You could apply to the Honors College at both Penn State and Pitt to have a more academically focused environment with smaller classes. If admitted to Schreyer, you could just live in the Honors Hall and never be around Greek life or loud parties if you don’t want to, and could take as many small classes as you’d feel you want. (Schreyer apps are reviewed by professors, not adcoms, so the essays are paramount - professors want to see if, based on the essays, you’d be a good addition to their seminar).
Other than that, good job on ditching Bucknell due to fit (Greek life); Dickinson, Franklin&Marshall, Washington&Jefferson, Susquehanna, Juniata are all good additions.
Look into what Kenyon and Skidmore may offer?