I'm thinking:

Tyros 3 = Tyros keyboard
Tyros 3XL = includes speakers & sub
Tyros 3XXL = includes speakers, sub, bag, pedals, headphones.

There's no chance of an 88 Tyros version - find me one person who will buy one. I don't know if there'll be a 76 key version, but if so, I doubt Yamaha would choose to tell just one dealer about it.