Now, this is strictly opinion, but I think that the weapons in Halo CE were the best out of all of the halo games. They sounded powerful and awesome.
Pistol- The CE Pistol sounded powerful, unlike the Reach Pistol.
Assault Rifle-It actually sounded like a machine gun.
Shotgun- Not much change here.
etc.
Now remember this is all opinion.
Thoughts?