Hi, I was wondering which one of these TV's to get? The specs seem pretty much identical other than the 660t has built in wifi, regional dimming (through the LED backlight). The only big one for me is the regional dimming. How much better is regional to standard. Is it worth the extra £70. Also how good are these systems for gaming because I have heard stuff about frame lag but I looked at another frame and you just need to set it game mode and it aparently fixes the problem although that was with a PS3 and I have an Xbox. Thanks.