In my opinion dont go any bigger then 20s with the drop, take a look at the other thread asking about wheels, i posted some pics of my ride there,
Also the 2" coils are basically race springs, handling is great but be warned ride is rough.
I run 20"x9" wide for my spring/summer/fall wheels and it is great, dont get any wider then 9 because you will run into rubbing issues, my fitment is basically spot on as it clears the struts and has maybe 2mm or so before it would rub the inner fender while turning, tires are 265/45/20, also since this is rwd it will suck in rain with wide tires, mine are 9" and paired with tires that have hard sidewalls and the really stiff drop, while turning at an intersection your rear can slide out at any time, happened to me multiple times but i know how to handle it, if your not careful you'll be doing a 360.
Any wider then what i already run is just dumb, my bmw does have drag car tire sizes but it also has awd and a ton of power, rear wheels are 20x11 and 315 tire and front are 20x10 with 275 tire so its a ton wider then the pathfinder but its designed for it and weighs more, you also have stability to save your a** where as the pathfinder you dont.
And heres a pic of the rear beamer wheels, when i said drag sized i wasnt kidding,
