The double trigger on your tippmann is nothing compared to an intelliframe. Correct me if I'm wrong, but when you get a double trigger on your tippmann, your getting a trigger guard, adn a trigger. The frame is integrated into teh reciever. On a mag, you are replacing the whole frame.
Intelliframes have the capability of hooking up a microswitch to them so you can have an "intellifeed" to your hopper so it agitates during every trigger pull. They are light, strong, good looking, and you have a good 4 or 5 choices of different trigger styles.
Mags have more.... They have upgrades that DO more then tippmann upgrades. They also have WAY more cosmetic upgrades.
A mag is a good five rungs up the paintball ladder from your 98c.
Check out
www.TheMagSmith.com
and I have a couple articles that might help you on my website (click sig).