Mr. Nick:
Welcome, in advance, to San Diego! I am somewhat familiar with the Hiltons here. Torrey Pines, as mentioned, is terrific. Del Mar is usually disappointing - small, though good location. Mission Valley Hilton was converted from a Doubletree some time ago - great location - high rise structure, likely has concierge lounge. Also, Hilton is in the process of opening a new property in the Gaslamp area of downtown. I don't know if it's open yet, but that will be the center of "action", if that's what you're after!
I'd be available for drinks or dinner if you'd like to meet. E-mail me if you're interested!