I am slightly polarized about this topic.

If a 2003 GTP in good condn with my mods is worth about $6000, I can't really think of a $6000 car I would sooner have for a DD.

On the other hand.....after every time I work on the car I swear its the last time I fix something that was unbroke. So times like those, the most economical to operate $6000 car would be a consideration.