Easy choice for me, since I own a home there - Hawai'i (Big Island). Compared to Oahu and Maui, the Big Island is quite affordable. You can buy a 2BR condo across the road from the beach for $150k. The cost of living is not nearly as high as some have exaggerated it to be, and the weather on the Kona side is fabulous. Of course, if you base your life worrying about disasters, the volcanoes and tsunamis will scare you off. But I'd bet that the Spanish economy will collapse before a natural disaster does any appreciable damage on Hawai'i.