That is a debate that has been going on for a long time. It seems as though everyone has an opinion on this subject. I personally like NAUI. My wife is SSI certified. I really like the NAUI better, but bottom line is that we are both diving and doing safely. So I say, use whatever works for you. Individual instructors are a much more important part of the equation. A truly great instructor will not only teach you what you need to know, but will inspire you to continue learning about scuba.
I know the water there in Cali. is cold, but there is some great diving to be had right there.