Major repair two weeks after buying a certified preowned luxury car. Keep or Trade?

Only 3 weeks ago, I got a 2010 certified pre-owned car with 30k miles on it. Its a pretty sick car, and my dream brand, model, color and every toy imaginable. One week ago, and after only driving it for 400 miles, it broke down because of some recall work that was not done properly right before I go it (they have to check for recalls and fix them alongwith a couple hundred other check points and replacement parts if necessary before they can certify it). Long story short, they are replacing the cylinder head under warranty (usually like a $5,000 job), which is pretty much the top half of the engine to enure that I have no more problems. I don't know if I should feel good or bad about such major work being done to my car at such an early age and mileage. With the CPO I have warranty for 4.5 more years and 70k miles. Would you keep it or trade it ASAP?