supercharge it, why:
1. you can run out of nitrous
2. nitrous can blow up
3. you can inhale it(maybe this is a good thing, lol)
4. there is an on/off switch
5. the only cool factor is the purge valve
6. engines don't like that sudden pressure
7. the added power may not be enough
8. waste trunk/seat space
9. you have to add your source of power, an empty bottle is useless
10. a supercharger would pay for itself in terms of fun factor vs. refilling a bottle