The way I see it, nitrous is alot cheaper to start out with! I got my edelbrock nitrous kit for $525
.including bottle heater, purge kit, fuel pump voltage booster, tachdriver, RPM activated window switch and all the necessary hardware! Needless to say it was a steal! I paid $300 bucks for a professional installation and it has worked out great! To buy a charger and get it professionally installed and tuned, will at least run you a good 3 or 4 G's!
..and 2v's are known to not be able to handle boost very well! Unless you have forged internals, I wouldn't feel safe with a stock boosted 2v, but thats just me! Not to say that nitrous won't blow your motor up! Get greedy on the shot and you will kiss your motor goodbye! I do however plan on getting a prochager and a SHM shortblock in the near future!
Miguel