I agree with the bilock recommendation just be sure to install the cylinder into quality hardware as globallocky has recommended. The abloy recommended above is the most expensive mechanical model they sell because the interior thumbturn locks. You need to check your local life safety codes to see if it is something that should be installed. Your fire marshall can fill you in on that info. The problem with these types of locks is IF you lock the thumbturn while you are in the house say sleeping and the house catches fire your now not only faced with getting out of the house but also finding a key and operating a lock in a dark smoke filled room. Most areas life safety codes do not allow for double cylinder deadbolts to be installed on entry doors.
A single cylinder abloy deadbolt will ensure that you are within your life safety codes and offer outstanding protection at a lower price. This model
http://www.bayarealocks.com/product_inf ... ucts_id=28 will suit your needs and the owner Dennis is great to deal with and will make sure everything is ready to install when you pull the lock out of the box including details down to sizing the tail pieces for your door thickness. SecuritySnobs is also an amazing place to deal with and can likely get you a single cylinder deadbolt for less than bayarea locks. I do know if you are doing several doors in abloy knobs and deadbolts like I did he will work with you on pricing but you would have to speak with him and work something out with your number of doors.
The abloy deadbolt faces are hardened steel throughout and not just hardened inserts so even drilling the mounting bolts out from the face of the lock is a long task as is destroying the abloy cylinder enough to operate the lock. On top of this the abloy H2K bolts are rated at over 2 tons of break resistance.
On your security door, if the deadbolt is locking into a steel security door frame then make sure it is installed securely. If your deadbolts are locking into a standard wood frame be sure to use security strikes. The abloy bolt box that comes with the lock is actually very good so I personally don't see a need for a security strike. If installing into a wood door to wood frame then look into security wraps from MAG security or other manufacturer to strengthen the door after drilling a 1" bore for your bolt to mount in. A great all around kit for protecting wood framed doors is door jamb armor which I think you can get full kits from security snobs or from
http://www.djarmor.com. I am likely overlooking something as I am tired and trying to summarize everything as much as I can so I can get some sleep.
If 125-150 dollars per deadbolt is too much then let us know what kind of budget you are working with how many doors you need equipped with hardware and we can recommend something in your price range. Also if you are working with a very low budget install let us know a bit further what your biggest security threats are in the area. If you are just needing brute force resistance then we can work into much cheaper solutions and explain what type of security you are giving up where you are saving money. We can explain security of any system you will get at any price range you choose.
For the best book out there on high security locks and their operation, take a look at amazon.com for High-Security Mechanical Locks An Encyclopedic Reference. Written by our very own site member Greyman! A true 5 Star read!!