Unfortunately, there aren't any IPS TVs on the market at that size - only the 49" and 55" models of last year's M-series were IPS. If you want a wide viewing angle, you'll need to size down to 65". In order, the best picks at that size are the Sony X900C, LG UF7700, and then LG LF6300 (though those last two TVs aren't great).
Thanks for the suggestion. We'll look into making that kind of filtering more accessible.