These are internal statistics in the department according to a psych major who is going to UCLA for a PhD in clinical psych (#1 program in the country), but Pomona’s psychology ranks #1/#2 pretty much every year in terms of students going off to top graduate school per capita. It’s a super well-respected program with a heavy research and seminar emphasis. The five colleges also enhance your psych offerings- last I checked there were 90 or so distinct psych courses offered at one given year. I feel that Pomona would be the best academically of your three options.