Hi,
the standard panel in EU is 2440x1250 or something similar. Thats what you can go in any big shop here in Spain and buy right away.

What will serve you better could be half 8x4 table. So you make 1300mm x1300mm working area. That will do a big sheet in 2 times. Further more you will avoid big ball screws, servo drives and all stuff associated with longer than ~1600mm machine. For the money of a small machine you will have a machine capable as a commercial 8x4 router