Invest in a decent Blu-ray player. You bought the nice TV, why suffer with a cheaper Blu-ray player? The PS3 is one of the best Blu-ray players still as it always updates. Any high end-Samsung or Sony will be good too. Cheaper Blu-ray players cheap out on the lasers. Go for something 399+ for the best image quality and user control.
Do the opposite on cables. spend the least amount on cables as you can (Get HDMI for full 1080p). Monster, and any other expensive cables are joke. There have been many extensive tests that proved cheaper cables work just as good as cables costing $200+.