^^^^ Agreed. Stick with a 50 shot.
You should go with a wet kit if your funds so allow. You'll be find to run a 50 shot on stock fuel delivery components.
Personaly, I prefer Nitrous Express, but NOS brand isn't bad either. The accessories that both of the afore mentioned manufacturers make are kind of pricey. I would definately check out
www.speedshop.org. They sell Dyno Tune products there. From all the reviews that I've read, the products are good quality and they are much less expensive then the competition.
When running nitrous it is best to get a bottle heater and purge kit. There are other various accessories available, but if you look around you can decide on your own if you need any of those (i.e. - window switch, progressive controller, exc.....)
If you have any other questions feel free to post up.
***EDIT***
You might want to hit up a Spec V specific forum to find out wether or not you'll need to go with one step colder plugs. You'll probably be ok on a 50 shot, but if you go up to 75 then you might need to go one step colder.
www.thevboard.com is a good site to check out, if you're not already on there.