I'm looking to buy an EcoDiesel. I've seen several things about the entire recall situation, but not exactly the answers I'm looking for. Is there essentially no problems with the engine if the proper tune is installed? I know several people have had problems after having the AEM installed, but I'm not concerned about it if the proper tune can fix the issue. If so, how expensive can the tunes be and which one is best for fuel economy without totally compromising towing capacity? Also, if I find one that hasn't had the AEM installed, am I required to have it installed or can I leave it stock and not worry about the issues others experience with the AEM? If there are any other concerns I should be aware of with these trucks, I'd greatly appreciate being made aware. Thanks much.