I'm considering a SR5 since I would like the 3rd row. With the production starting in the Fall, I'd imagine we won't have to wait too much longer for Toyota to drop the rest of the trims.
The only trims that have pictures or been presented to media are the Limited, TRD Pro, and Trailhunter. Those might be the only prototypes they have built. We will likely get more information and another press event this summer sometime when they get more built and start to spool up the production line.