kubota d722e cylinder head

hi guys! i want to pick your brains if possible i need to replace the cylinder head on a d772e kubota engine. my question is do i stick with a factory casting or go with an aftermarket replacement casting? i have no experience with these, just wanna make the right choice. the cost difference between the two is not that much, but if one is more durable than the other i would like to know. i appreciate any input. thanks!