3-D it isn't an option you can just pay extra for, like better speakers or a nicer remote.
Different television sets either have 3-D or not, but the market has been moving towards offering 3-D. Even if you have a television that can play 3-D doesn't mean you have to buy glasses or use it. It will still play standard television and movies.Click here for an accessories checklist from Digital Tips
Click here for a 3-D television overview from Consumer Reports