need help! choosing right kit

[Boyan Silyavski]

can i use central 2525 ball screw with Nema34 for X and Y axis

Dont do that. Especially at that size gantry and that Z travel.

At 300mm z travel you have to make sure when you design it, that the long ball screws are more or less on the height where the cut happens. One design consideration most people overlook.
That is good for you because you will have maximum actual travel 2000mm long - ball nut legth