Actually Stainless Steel 304 grade security door is good. Just make sure it is thick enough, like 3mm will be the best. less than 2 mm is too thin, can be pried open actually.
But the weakness point of the doorset, is the lock itself. There is no need for a thief or burglar to attack your door, because the lock is so easy, no different than the ordinary locks on wooden door. The burglared case posted above is quite common, estimated takes less than 1 minute to enter. But if we just change the key cylinder to a high security type like KESO or EVVA, it will become near impossible for a thief. For a robber, I will still feel sorry for him. Probably after the police arrive, they are still trying to break the lock or door.
The point is, get a good thick door from a reliable door company, then get a good lock from a locksmith only. Sorry I am a locksmith from Kuching Sarawak, can't help you guys out in Peninsula. But I am trained from KL so I know some folks selling high security. Trust me, a door salesman might bluff but he knows nothing about locks. Door is their field, not locks. For locks, look for your locksmith. AND WE ARE TIRED OF REPAIRING LOUSY LOCKS INSTALLED BY DOOR SALESMAN!!
This is not my two cents, this is pure brutal knowledge.
Master Locksmith @ The Fine Lock Shop Kuching
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