Stopped by Lowe's after work just to look at Nail Guns. The cheapest was over $200.00 and wouldn't handle the size of nails I would be using. The cordless versions were twice as much as the pneumatic and you still had to have a battery and charger, no DeWalt's though.
I may just go with my original plan and use decking screws, I can get 5 lbs. for around $30.00.