You will get the best quality picture with this TV if you use the Component Video inputs on the TV, and you should look for a receiver that has Component Video outputs. Component Video inputs and outputs are connected via three cables in one cord that carry the video signal, and are color coded red, green, and blue. Any DVD player should work the same, since DVD's output a standard definition signal. I would suggest looking at a complete home theater system, since often times a standalone receiver that has component video outputs is often the same price as a complete home theater system. If you want to see an example of a home theater system that should meet your needs, and comes with a DVD player that upconverts your DVD's to High Definition quality, you could look here:
http://www.bestbuy.com/site/olspage.... I hope this helps!