I would look at the rankings.
But important things to think about when picking a school is: how good of a graduate school do they have?
If there is a good graduate school there will probably be good opportunities for research (which is critical for going to graduate school in psych, which is critical for psych majors because a psych BA is basically equivalent to a high school diploma). For example, I am in the middle of applying for graduate school right now; my undergraduate school has a great grad school, so now i have the chance to attend here because i have worked really closely with the people i am applying to.
Schools like U of Wisconsin-Madison, U of Minnesota, U of Kentucky, U of South Florida, Florida State U, U of Illinois Urbana-Champaign, U of Missouri - Columbia, USC, LSU all have good graduate programs. Also, be wary of rankings for graduate programs, as it is not so much the school as the person you are working with that matters and rankings are often very misleading because of this. Also, there are often multiple graduate psych programs (e.g. clinical, developmental, etc.) that differ in quality.
Additionally, i know U of Central Florida - Orlando (UCF) has a TON of awesome opportunities for undergraduates; they have amazing facilities and they really let the undergraduates get heavily involved in the labs, taking them to conferences with them and allowing them to contribute to the research beyond data entry and running participants.