- Elder Legendary Member
Bungie stated that the game renders at 1152x720, which your Xbox 360 will scale to the display resolution selected in your system settings. What output resolution is your console set to display? If you have pillar boxing, the game may actually be displaying at its native resolution, which would be awesome.
Also, to play with spoken dialogue in English, you're going to need an English language copy of the game. I believe the compatibility across regions is pretty good for Reach, so your options should be numerous. It's a great game that plays well online (out of the 3 Halo games on Xbox 360, I believe it performs the best online).