I would consider and ask yourself, why do you 'want' a remap?
If it's chasing numbers that's fine, i don't have a problem with that myself. If it's to result in a faster car, again no issues there. However 1000 miles or 3 tanks of fuel later once you got​ use to the gains, you've shown your mates the new pops and bangs - at this point pretty much the outlay results in something added to your spec list and not a fat lot else truth be told.
With my last car a full bolt on SR20 Almera GTi, with intake, exhaust, tomei cams, custom hand built equal length header, lightweight flywheel and pulleys a remap ideally would have been needed as at low rpm it wasn't that nice to drive. Some cam'd high comp N/A and boost builds need a remap, a stock cam'd VQ35 doesn't.