No reason to buy anything more expensive than this:
http://www.amazon.co.uk/gp/product/B000RO1ZCG?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00
I've got one, had it years. Very good.
I'd just try & borrow one for that purposeI'm now considering getting one, just to measure exactly how much my self judged torques deviate from the supposed ideals.