How many of them have strong STEM programs though? My partner went to a PUI, but it was firmly a liberal arts school (not that you can't move into STEM with a liberal arts degree). I chose my own undergraduate school because it had a decent engineering program but obviously was a research university.
The two I can think of are Harvey Mudd and Rose Hulman.
The two I can think of are Harvey Mudd and Rose Hulman.