David, I work in Nottingham-you're welcome to borrow my big torque wrench when you need it if it saves you buying 2 (I only use it for the wheel bolts)
One of the lower range ones is usually fine as you are usually working steel bolts into alli thread. The big b'stards are usually good if you are paranoid but unless it is a critical steel to steel job like major engine work then there is far less chance of damage.