When adding or replacing a lock on a door for improved security there is more to consider than just the lock itself. You definitely should be looking at a lock that is strong and secure and one that meets the correct standards for your insurance etc. You could well be wasting money if you’re installing a lock to a door that is weak or damaged or if the door jamb (casing, door post etc) is weak or damaged.
A criminal intent on gaining access to your property will not spend their time attempting picking the lock or bypassing it as a professional locksmith would do. A criminal won’t worry in the slightest whether they are going to cause damage to your property if the door itself is weak or the door jamb etc is weak then they will just kick it in.
A weak point on a door is the area around the lock itself, the area here has been morticed to accept the lock and any force implied to the door is going to concentrate in this area. Another weak point is where the bolt of the lock enters the keep (Strike plate) in the door jamb, both these areas will likely give way if forced, the lock itself may not break but the door or jamb most likely will.
Another area to look at is the hinge side of the door, have the correct hinges been fitted? if the hinges are external then have security hinges been used ? have the correct size and type of screws been used for the weight of the door? and are all the securing screws in place? There are different types of hinges for different doors and for external doors you should be considering security hinges, but again these are only worth fitting if the door is strong and the door jamb etc is solid. The door frame should be checked to see if it is installed correctly and that all securing bolts are adequate for holding the frame in place, the frame should not move when pushed.
There are many considerations to make when adding or replacing a door lock for improved security and there are many options to improve the strength and integrity or the door itself including the frames and the hinges, there are also options for improving security around the letterbox, another vulnerable area, if there are glass panels then these also need to be looked at so if you are thinking of improving your security by adding a state of the art, top of the range lock then this is definitely important but you really need to look at the existing door and frame etc before going ahead or you could just be giving yourself a false sense of security, wasting your money and worst still leaving your property vulnerable to a break in.