I would so buy that just for the online. CE is already up for download as an xbox original, and doesn't need a remake, but the pistol was overpowered. (Only way I got through the library on heroic was by abusing the pistol and shotgun, lol.)
Edit: Reach does not lag unless ur host has a crap connection. It has lagged b4, but next match fixes it. I may be the minority because the game says my upstream bandwidth is crap, so don't quote me.
[Edited on 05.15.2011 9:44 AM PDT]