To Mod or Not to Mod, that is the question... LOL. Each person has their own reasons for what they do. In 2008 I bought a rare Foose Stallion new and I gave the dealer a full laundry list of items I wanted done before I ever took possession of the car. People said I was crazy for doing that to a rare car and it would kill the value. Maybe... Yes, I have an ungodly amount invested overall in this car now... literally $100K. But... it is exactly what I wanted, it was built to my specs, warrantied by Ford with the mods, and there is no other one like it... and I made it my daily driver from 08 until 2015. Am I satisfied? Yes. Could I have bought an all out GT500, super snake, or Shelby Cobra, yes but would not have something unique.
Fast forward to 2015, garaged Foose at this point, bought an LS Camaro for a new daily driver swearing I would not sink money into it and do the mod thing again. LOL... yeah right. Once in the blood, its there. I was in the same boat, keep an LS and mod with some resemblance of fuel economy or trade up. Mod, mod, mod... Decide on what fits your personality, your budget, and what you plan on doing with the car short and long term then don't let anyone beat you up for it. Its your decision.