22LR Varmint Rifle Restoration rechambers the Varmint Rifle to use. Weapon Animation Replacers improves a bunch of the rifle/pistol animations.

Weapon Retexture Project makes a bunch of the game's weapons (guns, mostly) look WAY better. Weapon Mods Expanded does exactly what you'd expect - adds a bunch more weapon mods and improves weapon mod functionality in general. I actually tend to run NV fairly mod-light, but there's a few that I like to have around.