Definitely do AirAid tube. I have the tube and the AFE ProDry, nice to not have to worry about buying a filter again. Can vacuum and/or wash, let it dry and throw it back in.
If I were you trashing the spoiler would be #1. Or sell it to someone who broke theirs on a curb and actually wants a new one lol.
I would do a vinyl wrap on the whole front end, over the paint for protection and over the chrome to see how it looks...
I wouldn't level though, IMO fuel mileage is all or nothing, may as well lift it 7" haha.
I like the mostly stock look so what you have planned sounds good to me... Once your AFM is gone I'd get a new muffler
Still need to do the U-bolt flip on mine, saving it for "the great rear end rehash".