I would go for Modular Scifi Hall personally … it seems to have more uses and if you had to redo the collisions you should be okay because it is modular and basic shapes.
I bought the Top-Down Dungeon kit and the collisions had issues, so I am weary of any of the other Top-Down kits from that supplier. Ancient Environments also had some collision issues if I remember correctly … but it may have been resolved … not sure.