i was very disappointed with the latest edition of nascar heat.
you should stay away from it because the only difference is now you have a practice session and new paint schemes. the people who make the product are moving to a new build for the next edition so all they did was add a few new things on the old version and charge a lot of money for it.
if they do move the next edition to a new build and it is completely new then wait on the reviews before buying it as it will be around 80-100 dollars for the full spec version with all the extras, 55-60 for the basic version. plus when you add on all the schemes they release during the season it suddenly becomes expensive.
nr2003 is still the best out there.