Anything international would be an asset in your case. Also, from your profile your analytical skills speaks for itself - you were a biz undergrad, and you work in a biz career already (finance), so there is no doubt that you'll do well academically in school, and that you won't have too much trouble finding a decent job coming out of b-school. What isn't as obvious is "the guy behind the resume" - your group/team/leadership skills which you can draw from your extracurriculars (and if you can dig an even deeper well, you will have even more to draw from -- i.e. continue to deepen your involvement in the extracurricular orgs that you're in). Again, short of joining the military or doing something completely different in your life, the impact of anything you do in the next year or two will be incremental (and if it's transformational, you'll know that if it happens), which can only help your case. Having said that, if you're ready to apply this coming fall, by all means apply. It also comes down to the economy as well and where you're at job-wise. As you know, financial services is in the dumps right now and probably will be for a few years; so that's something to take into account - I personally feel that independent of the economy, you're best off going in your mid-20s, and it makes less sense as you get older. But if you're really focused on getting into financial services, it may be worth waiting an extra year or two (but no more).
As for SLO, I knew a girl who grew up there.