I'd definitely hold off on those mandarins until your tank is very well established. Not for the usual reason - that they need a lot of 'pods. As you know, These exciting new ORA offering eat prepared foods. Instead the problem is that they are still pigs, requiring lots of food.
I'd love one myself. But in a 29g it would be pretty hard to keep the fish well fed and also keep nitrates and phosphates low.
IMO I'd look for some fish that require a bit less food, which is almost anything, assuming similar size.