Get Bullet time + Sprinting + Bigger UI + Pre-Order Item Packages (All of em)
= New Vegas the way it was meant to be released...

Trust me bullet time and sprinting is awsome (uses action points) Bigger UI is so that you dont have to scroll down to see all the dialog options, with that mod you will probably find a lot of dialog options you missed. The player tends to simply stick to the first 3 lines and not bother scrolling down.
If you get that pre-order package thingy you will start with a bunch of nerfed stuff. The Best-Buy Pre-Ord was the best one though, granting you Light Weight Metal Armour and a Grenade Rifle (plus other items) at level 1...
I don't recommend the pre-order packages unless your looking to play the game on "even easier"