I got the approval for an OLED

I am debating between the B4 and C4, both 77". After doing some research it seems the B4 is very similar. The TV will be used for mainly movies and TV shows ( damn kids won't let me enjoy any of my expensive toys)

The B4 I can get for about 1300 with LGs promo code of 15% off. Or get the C4 with 2100 with the same promo code.

There will be a window opposite of the TV which I am currently debating on mounting it or not. Kind of nervous about the glare during the day. But night time will be dark.

Which one should I go with?