I'd vote for the Humphreys basin area. That is some of the easiest x-c you can find, spectacular and easy to get to - Piute pass is a piece of cake and lots of variations depending on how many miles you want. You can hop over the hill into Granite Park, or up to Royce lakes, or to Merriam Lake - many possibilities. I skied up to the top of Four Gables a couple years ago - incredible view and not steep anywhere. I don't know if it's a lot of talus in the summer - it might be. You could probably look it up online and find out. You'll find a lot fewer people in Humphreys than around the Minarets.
Argh Paul, just when I was about to choose the Minarets you make me think twice about Humphrey's. I will keep an eye on the weather and see how much snow we get. I suppose the lower elevation of the Minarets would mean less snow? Can anyone correct me on that?
Lower elevations won't necessarily mean less snow. There's a lot of variation in snow accululations in the Sierra due to local topography and weather patterns. I look a the Dep. of water resources website for snowpack info. Just google "Snowpack" and you'll find it. they have the results of the monthly snow surveys, and real-time data from remote snow sensors scattered around the mountains - very useful.