Beware the smiley face! =D
I dont think Natal will have a big impact on Reach, personally. And if i HAVE to use Natal to play reach, im not going to get it.
Controller based Halo for the win.
EDIT - When i say i wouldnt buy it, i mean if likeall of the controls were Natal. If it was just a little bit of the game was natal controlled, i wouldnt mind too much.
[Edited on 09.13.2009 8:20 AM PDT]