I ask the same question some time ago show/driver on this forum:

Solution:
Show the car the first yr. or two and enjoy the experience(trophies if you get one).
Enjoy the car by driving where you please.
Out of town trips to show the car are costly,but it's your money.
Build it the way you want to $$$$ wise.
Don't add up the build invoices (ok after you are dead).
If it's a performance engine drive it to get that rush.

I am glad I chose to drive it.