Newbie needs advice on rims and susp

[Djc1827]

Newbie needs advice
Just bought my first SUV. I bought a pathfinder 2011 because of third row seating and the towing power 6000lbs. I will be using it on occasion to tow a trailer and my 2011 wrx (475whp). I don't leave things alone I mod everything. That being said I am torn between 22 or 24" rims. I hate wheel gap but I don't want to lower it two inches and it ride like my wrx which is bumpy kinda defeats of having an SUV that feels like riding on marshmellows lol. I was reading about how people use 22" with larger tires so more cushion and less wheel gap for example 275-40-22! Can u educate me on these subjects?

22" or 24"
Mpg w those sizes
Tire sizes
No staggering please
Grills
Wheel gap
Towing being lowered 2"
Ride comfort being lowered...