[Please take into account I know nothing

]
Hi,
I've picked my wheels. Going to be 17" Konigs.
Now I'm looking for a conservative spring. The Tanabe NF sounds like the best for me since I don't want to sacrifice ride quality as much but would like some better handling. The Swift Sport Springs also look appealing but not sure how much they drop. If anyone else has a recommendation for a conservative drop, with NO chance of rubbing, please let me know. I plan to have a 09 Fit Sport with no other mods besides wheels, springs, shocks for now.
Maybe in the future I may add a body kit.
It's been recommended to change shocks as well when changing springs. How do I go about picking the appropriate shock?
Also, how much does labor usually cost for spring and shock installation? Will any body shop do it? NYC here.