Having owned a Sharp Aquos before and now a Panasonic plasma, I would go for the Panasonic. Although the Sharp had a nice picture , it could not compete with the motion and blacks of the Panasonic. With the LCD you will have motion blur specially being a 70" and your angle viewing will not be very good and in a at night time, you will have clouding and flash lighting. Hope this helps a bit.
Media room- LG 4K OLED EG9600, Pioneer Elite VSX-90, Samsung 4K K8500, Klipsch Gallery G28's, Klipsch Sub 12, Klipsch RS-52 II, Optik HD cable
Living room- Sony 4K 79XBRX900B, Onkyo RC-360,HTPC, Klipsch Reference R-62II, Rc52II,PS4
Gaming room -Panasonic ST60, PS3, Wii