You will be really competitive for southern california with or without that step 2 score. I scored about 15 points lower than you did on Step 1 and received interviews at every socal program. I ended up taking step 2 in december in time to post a score before programs submitted rank lists, which had been the advice of my advisor all along. I ended up matching at USC. You are probably pretty competitive for UCLA and UCSD as well as USC, UCI, and Cedars. From my interview experiences, in terms of prestige: UCLA > UCSD > Cedars > USC > UCI.
You will find over the course of the interview season that the most prestigious program you interview at might not be the best fit for you. I ended up ranking the programs: Cedars > UCLA > UCSD > USC > UCI. I'm sure some people ranked similarly and other ranked them very differently. With your stats, you will be getting interviews from most likely all of those programs so you would be better off to rotate at UCSD, UCLA, or Cedars (arguably the top 3 socal anesthesia programs) and really put down some good roots there.
While I'm excited for USC, its not my top choice. I wasn't nuts about the SRNA training school and how pro-SRNA the chair was. However, I wanted to be in socal so it all worked out. Here is a quick review of the other programs so you can get an idea.
UCLA -- Probably the "biggest name" anesthesia program in socal. Lots of good research opportunities and great location (very close to santa monica). Great facilities. It's a huge program which might be a plus or minus for you. My only issue with the program is that some of the residents I spoke to thought of themselves as 'slave labor' for the hospital. I didn't get that feeling (but I was only there for an interview day so who knows how it really is). The only other negative is that the bulk of their CV surgery department left the hospital and moved to Cedars Sinai.
UCSD -- Very laid back medium sized program with some outstanding faculty. Residents were all really nice people and very social. The residents wished that they didn't have to travel around to different locations for their training (currently splitting time between the VA in La Jolla, main medical center in Hillcrest, and Thorton Hospital in UTC)…. Only about 15-20 min drive from each other. UTC and La Jolla are right next door. Weak ICU and peds experience. Main Medical center is getting old and needs some renovation. Fantastic regional program. I would have ranked this higher, but the residents weren't able to find jobs in SD because it's a small city.
Cedars -- What I would consider the hidden gem of socal anesthesia programs. Great location in Los Angeles with the best balance of clinical/didactic work. Cedars has a private practice anesthesia model in the department (about 150 anesthesiologists in the group, 40 of which teach). They teach because they love it. Program is like a family. They just increased in size from 4 to 8 residents per year so obviously this is a program on the rise (still a smaller sized program though). The faculty are insanely well connected and current residents landed some of the top fellowships for CV and Regional in the country (Cleveland Clinic, Cornell, and Northwestern I believe). Very strong OB anesthesia (I will actually be doing my OB rotation at Cedars because USC doesn't have enough). The UCLA CV group transferred to Cedars so now there are more hearts than you can shake a stick at. Downsides: No computer-based EMR in the ORs, doesn't carry the same name recognition as UCLA, newer program.
USC -- my future home so I might be a bit biased but I'll tell you how it really is. Great facilities with a brand new hospital. Location is close to downtown on the east side (not greatest area). Residents are all really laid back and like spending time with each other. The only big con is the SRNA training program and how pro-CRNA the chair of the department is (he is the chair of the SRNA training program too). The program is very well connected to different private practice groups in the area.
UCI -- brand new hospital with some very nice faculty. I wasn't crazy about the location since its right off the freeway in Orange, CA….. yeah, its not in Irvine. Had some issues within the department a few years ago so it has been "reborn" recently after the scandel. The chair/PD are both huge advocates for the residents. Have good relations with CRNAs on staff. Hospital is amazing and everything is state of the art. Residents seem like a family and like spending time with each other. Downsides: location isn't great, have to go do CV at an offsite location.
I hope this information helps, I guess it turned into more a socal anesthesia review more than your original question about step 2.