What do I need to choose ??? Help needed

It has been few months that I am looking for a Home theater system, and I cannot still decide what I need to buy. My budget is very limited ($2000)but I would like to upgrade or add other components later as I would have more money. Unless many people, I dont want to buy a Bose system even though it would be the easier solution. Can anyone would recommend me: 1) one receiver 2) and of course some speaker (front, rear, center and Sub) Please help to choose my system, I am totally lost with all the choice. I need advice for using this money wisely. Thanks,