I looked at Avalon Nob Hill Sunday. It was a nice place. Are you looking at the 1 bedrooms or studios? I took a really quick tour b/c the guy forgot I was coming and was busy. It is just a large generic apartment building, which has definate pros and cons. I did not see the gym, although I asked a resident who said it was small. The one bedroom I saw had a garden view, but was somewhat noisy. The fixtures were all new, and the place looked pretty big. It was clean. The area is good, although a little too industrial (it is technically lower nob hill). You could walk to school. It is seemed safe. The ppl who lived there seemed to be more professional than student. I think it would be good b/c I know you said earlier you wont be able to look at apts.
I ended up finding one that is cheaper and more individual in a 12 unit complex, hard wood floors, crown molding, ect in Nob Hill. But that is more my style. I took some photos I can prob email to you. PM me
On the other ones...Market and 10th is in a bad area, and I dont know about the other places.