The short answer is NONE. Don't go buy one ever until you've gone to look through some with amateur astronomy clubs near you. Learn about what you might buy. And you really really really must buy that scope, buy your first one used from Cloudy Nights. I've bought many telescopes that way, and it's littered with good ideas and experienced observers who want to move to a new telescope. It's the best place to look. So, go see if a club is near you from the ones listed below.