Tmobile 8x or 810

So I'm coming up on an upgrade, conveniently around the 15th of November and as a current hd7 owner I'm going to stay with WP. At first I was leaning towards the 8x for my upgrade (purely for the screen resolution upgrade over the hd7) but the exclusive apps on the 810 are tempting me more and more, even with its lower screen res. I know some people are put off by the 810's thickness and weight, but I dont have pansy arms and I think both are extremely good phones. For all you tmobile users, which one will you get and why?