Hi Nedim.
You will NOT see a Pa2X TR simply because the market you believe is the biggest in the world is NOT what you think it is.
There is a very good reason why all TR editions are made from the lower end keyboards and a lot of that has to do with customer feedback, money, and the market it's directed at. If KORG are selling as many as you say, then looks like they got the balance right.
If you want more, then you will have to look elsewhere because your in the minority and you will have a long wait before you see anyone developing flagship arrangers for your market.
Your one of the very few people who can design and create their own styles. You also know the art of sampling very well so really you have all the tools inside yourself to make any flagship arranger into the ultimate “TR”.
So what's stopping you from doing that ?.
Get yourself a Pa2x and a V-Machine and never look back mate. If you don't do something about this yourself you will never be happy.
Regards.
James