2. Spend your BluRay money based on your situation. Do you have wifi and high speed internet in your house? If so, get one that does all of the “smart” stuff for the TV. It's cheaper to upgrade this unit in a year or two if needed compared to the stuff that is built into a TV. ALL BluRay’s will play DVD’s as well as audio CD’s. Consider ones that permit software updates that will work in your home situation (wifi vs. hardline internet, cable internet vs. others, etc.).
3. Sound system: If it's just you and you want to use headphones why would you spend money on a 5.1 or 7.1 system (5 speakers plus subwoofer or 7 plus subwoofer)? Consider comfortable headphones that may even be wireless. Consider “open air” type that permit you to hear other sounds in the world around you rather than the ones that cover your ears completely and block extraneous sound. You want to hear the phone or that burglar, don't you?
so smart tvs have all the stuff that blueray does? Except for the DVD part?