That time of the year is the best weather in LA: warm days, cools nights. You want to be at the Hotel Bel Air, a very special place. Pen is right behind. Forget the others.
Rates at the Pen are "fungible," but will require some direct calls. We had a wonderful one bedroom bungalow a couple years back at an obscenely low rate. My call, though, the Bel Air, for romantic location, pool, sense of being somewhere very special.