I am debating between purchasing the Sony A9F in either a 65 inch or 55 inch. My viewing distance is approximately 7.25 feet to 8.5 feet (from where the TV will mount to my seat). I am curious peoples view on which size TV is the right size given 75% of what will be viewed will be regular 1080i from cable. It appears that sometimes when watching 1080i that the 65 inch picture is not as crisp as the 55 inch, and wasn't sure if the limited distance from the television is likely to create that issue. Many thanks to all in advance.