Well for a DD, I would build, but I don't hate on this who buy built. If thats what they want, then great for them.

As for a track car, it really depends. To build a good track car cost a good chunk of change. Cars like, miatas, BMW's, civic, STi/evo's, are easy to come buy with badass setups (AKA championship winning cars). Why would someone spend all the extra time and money to build a car that they are going to but the exact same mods on? But some cars, you don't really have a choice (like my next car )