Here is my must have list:
Cold Weather Group- remote start is a must for me (hot in Texas)
Trailer Tow group - the AUX switches for easy wiring of accessories
LED light group- the stock Halogens are awful
Proximity Keyless Entry - dont know how good it is until you dont have it
I bought this (cheap solution) to try to see if I could get away with a rattle free carrier. It raised the factory carrier up a few inches and I have no issues so far.
oh, and welcome to the forum!