What telescope should i buy?

Im getting ready to buy my frist scope and im confused on what i should really get. Basicly i am interested in looking at the planets (i would like to see saturn as clear as poss), the moon and stars as clear as possible. Seeing galaxies and nebulas and all that stuff would be a plus but not high up on my list.from what i understand im thinking a REFRACTOR scope should be good for me, but i dont know what size i should get or {what ever falls into the catg of "good optics"} eye pieces and all that jazz. my budget is $300-600, maybee up to 800. Clestron, Meade, and Orion have been the scopes ive been looking at sience (from what ive read) they are "good" in the telescope world.* also i would like the scope to have some sort of star-finder-goto-computerized mount feature. thanks!