I'd be pretty confident that any est binder you choose will do the job. As for color, in my experience Burton's colors tend to be pretty consistent within a model year.
And just a note: this year's Missions have the high back from last year's Cartels. The two bindings are pretty similar, with the Cartels having slightly upgraded straps and buckles, and the Missions being a hair softer.
Also, remember that most other binding companies have adapter plates that allow for "normal" disk bindings to interface with the Burton ICS deal.