I will agree that MSU is the no-brainer choice for his best opportunity to ease in the system with little resistance and competition. He should have the starting job no later than the end of spring should he decide to come here and there will be little, if any learning curve.
BUT,
Reading some of the interviews with him and his dad, it seems they have 2 other things in mind as well: 1) exposure and 2) grooming for NFL.
Regarding exposure: Yes, we are in the SEC and yes he will get exposure. But, that's assuming we win. We have a record breaking, SEC leading RB on our roster this year and nobody outside of the conference knows who he is. Dixon get's no exposure in the national media. That's largely because we sucked this year, but it also has to do with MSU doesn't sell on the nation-wide scale (most likely because we've sucked - we'll be relevant again once we win a few ball games). This could be an overrated intangible as NFL scouts are going to base their drafting decisions on talent more-so than where somebody played college ball. But, to a 20 year old, they may think their future is better secured at an Oklahoma vs. MSU.
Regarding grooming: If you are a QB with a cannon arm and you think you have a legit shot at being an NFL drafted QB, an offense like MSU's, Florida's, TTech, or any other where the QB spends 99% of their time out of the gun is no place to get yourself ready for the NFL. Yes, there are exceptions, but as a general rule, the better NFL QBs spent their college days in a pro-style type offense. NFL scouts favor pro-style QBs who take snaps from under center vs. 100% shotgun (see Graham Harrell). This is certainly a factor not playing into our advantage.