BEST REAR PROJECTION TV 50 to 61"

I CURRENTLY HAVE the 36" sony xbr wega,I LOVE IT,BUT WANT A LARGER SCREEN,i'am told i have to go projection ,I MAINLY WATCH DVD TROUGH MY SONY 530 dvd and MARANTZ SR18 RECEIVER/PROCESSOR. what brands and model in the 4 to 5k range.50" to 61" TV'S.