I'd say Weenk, in my opinion. He's preformed very solidly in past years, won numerous events, and beaten out Tom and Dennis, doing so. Unfortunatly for him, he's had many mechanical problems at Vegas. I'm sure if he gets a solid run at Vegas this year, he's got it made.
Neil's a great driver, on par with Dennis and Tom in most cases, but for some reason he wasn't invited to Vegas in 2013. That throws a red flag for me. He's still highly capable of a title, when he get's invited.
Mark has potential, but he hasn't out preformed the top guns many times. A few more years, and he might be there, but not yet.
We all know Ryan's a chip off the old block, but I still feel he needs more seat time. He's constantly showing that he can compete with the top drivers, but I don't see it happening yet. Then again, they did say that about Adam...
I think Linsey's the next guy in line. Just my overall thouht.