I just added nitrous to my 1LE a few months ago and love it. I went all out on mine and bought pretty much everything there was. There's a few things I got that aren't necessary but I got them for looks and ease of use like the billet aluminum heated bottle bracket, remote opener and PSN-1 gauge. Here's a list of everything I have in my set up.
-Nitrous Outlet Single Fogger Kit
-Nitrous Outlet 10lb Bottle
-Nitrous Outlet Remote Bottle Opener
-Nitrous Outlet Switch Panel
-Nitrous Outlet Heated Billet Bottle Bracket
-Nitrous Outlet "Big Show" Purge Kit
-Nitrous Outlet Stand Alone Fuel Cell
-Lingenfelter LNC-2000
-NOS Window Switch
-Innovate PSN-1 AFR/Bottle Pressure Gauge
-SLP Single Gauge Pod
-NGK BR7EF Plugs