It's totally up to you, but the Vinci that you own will do the trick, nicely. The 12ga. 3" shell is plenty big enough to kill gobblers. They shoot them every day with smaller gauges. As far as the oddly colored, Vinci, that doesn't matter either. Not everything in the woods is the same color. There are too many people out there that think if their pants camo doesn't match their shirt, they will never kill a bird. Unless you want to spend your money, use what you've got. It will work.
But, with that being said... A guy can never have enough guns!!