I love Top Shot! Jake walking out showed just how bad of a sport he is; his attitude was ruining the competition. Dustin has a great chance at winning; he's very versatile and keeps his cool.
I admit, Mike blew me away on that last challenge. However, he has been to elimination four times now, which means he consistently shoots poorly in challenges. Honestly, at this point, it could be anyone's game. The reason I vote for Dustin is a. He has fun. The other guys tend to over think their shots, and he just goes out and enjoys himself, so he doesn't tense up. b. He has been consistently winning challenges with weapons he is unfamiliar with. This means he's versatile. But, truly, it could go to anyone at this point. And I don't think I'd mind much if any one of the remaining four won.
I only included the Zig-Zag challenge because he counted it himself; in Wheel of Fire he comments that he's already been to three elimination challenges. I know that through editing, people can be made to look a whole lot worse than they actually are. I've read this article before. However, he did try to make Mike hit him, and you can't edit in temper tantrums that include sleeping outside, changing directly to green jerseys, or leaving the show because he was sent to elimination a second time.