TB03 be another choice with more settings available, one stop shop! TT01 be a bit more easy but I bet you may upgrade to other model soon if really addicted to RC.
Sakura zero is a new product for just some year so all of the options and spare parts of zero are still selling
And what p768syk hing said is that sakura zero mean sakura s zero`s full option product, so it is more expensive than sakura s but it have done the best changing