I'm going to put in a vote for UCI. Irvine is beautiful, wide streets, lots of green, and even though there isn't much interesting in the city, tons of stuff is 20 minutes to an hour away. Beaches, all manner of cuisine etc. It's EXTREMELY safe as well and the school district is excellent (if you're planning on bringing kids).
the only downside to UCI Med's location is that it is attached to the undergrad campus (great area) but the hospital is 20 minutes away via three freeways (on which people dont know how to drive!!!!) in an area that is average at best. However, the medical center does have housing nearby.
weather is phenomenal most of the year. It's hit 80 degrees in january at least a couple of times in my four years there. I will miss Irvine winters