Cool. I won't try heroic or legendary... normal's my game. (I had Halo 3 since launch, and I only finished it a few months ago. I meant to try heroic, but thoughts about the penultimate level made me reconsider, especially since I went through it again to collect all the skulls).
Yeah, I know of the VISR map. It's still not as nice as the motion tracker, and the enhanced mode only works in dark areas unless you want a washed-out image.
Time to kill some hunters...