Is there a true plug-n-play setup for a 5.7 with FI yet?

I wonder if I would be ahead just going Fast XFI since I know I couldnt leave the motor stock and would at least cam it and grind on the heads some. Seems a custom tune even emailed is a few hundred plus it might take a few swings to get it right and if you're not happy you are at the tuners mercy. I have nobody even remotely close with a dyno and the experience on Gen III's.