I'm just not sure that if you take Taylor out of this offense, which is where I think he will perform best, and put him in a more traditional offense that you won't be able to replicate his production with someone else.
Even if he is still the best available in a more traditional offense the margin between him and the next best is significantly smaller. And depending on salary cap hits, the better choice could be the cheaper option.
To me, if the Bills are planning to keep the offense pretty much the same, Taylor is a no brainer. If they plan on changing things up, he's not nearly as clear cut of a front runner.