Dry kit is a very good starter kit for anyone with nitrous for the first time. I would recommend run a 50hp shot and then work your way up, but keep in mind the supporting mods that need to go with nitrous. After you get used to Nitrous then get a really nice Wet Kit or Direct Port System with a 125 or more then you been in business.
And dont let people scare you about Nitrous, "O it will blow it up" ect. A properly setup & tuned nitrous system will be very effecient. I have had a 125hp Zex Wet Nitrous kit on my car for 4 years, but I have a tune and a ton of ecentials to make a kit safe and effective.