Here is a decent CDI 1/4"
and a decent CDI 3/8"
There are others with different torque ranges that are about in the same price range. Try and get an overlap of values.
Why two wrenches? Cause a ft.lb wrench at a low value setting is not very accurate. 5 ft.lbs. might be 60 in.lbs.... or it might be 30 or 90 in.lbs. Unless of course you spend more money... then they get more accurate.