Hi, I plan on returning my c550 and get the c6500,since it is available locally. I know c6500 has crystal full HD engine, but does that really help improve picture quality,clarity,colors,etc. and make a noticeable difference? Lets say I do get the c6500, will I see some real improvements in terms of picture quality(clarity,blacks,color,etc.). The c6500 costs about almost $400 compared to the c550, but will it really be worth the money. I am very nervous in returning the c550, getting the c6500, and end up seeing that picture quality is almost the same, which is why I need help from all of you. I will appreciate it. What should I do?