The Urban Paramount is an old favourite of our testers. It's solid, the lock mechanism is superb and very well protected, it's not too heavy and comes with a good bracket. Under handtool attack, it's very tough and super stiff, and gets through five minutes of brute force with ease.
In test two, it took a little longer than its cheaper cousin the Protector, but it did still require tools to lever it open once it was cut through. If this is your main lock you can be sure that only the most determined of thieves are going to break this one.