I did it. Totally worth it. For the throttle response improvement.
Best tuner out there is Seb at Specialty Z. He can do a remote tune for you if you can't find anyone local. His 370Z package starts at $650 and goes up depending on options. See his website
here
If you plan to do other bolt-on mods it might be a better use of money to tune all at once after installation. But you can always just have Seb update your tune down the road if you install them later. For that service, see his website
here