I'm not really looking to spend more than $500. I'll probably just use it on special occasions, about once or twice a month. I'm not going to use it every five seconds when my friends and I get together. I'll just mainly use it for pictures of family members, friends, vacations, etc. Size is not really an issue (I'm laughing for saying that). And I have no idea what you mean when you asked what kind of power supply I want. I don't really know anything about digital cameras.