i had mine tuned bout 6months ago, got several quotes and they were all around $600-$800, thats for a full tune starting from scratch with a power fc..
one thing i dont understand is why a fairly mildly modded car would take 5hrs on a dyno, i wouldnt go to a place charging 1200 for a tune, chances are they are just high rollers with a big name but doing the same job that the less known guys are doing...
i ended up paying well over 1200 and i felt a bit ripped off still, i think they put there efforts more into the big spenders , the guys with the best cars and biggest wallets, they dont care bout a young guy with an r33, hes small fry compared to the r35guy with $5000 to throw around so you get left till last and the job rushed, if your car is the last on the dyno and your picking it up late, like after dark, have to wonder if they have really put much effort into it..
just my opinion