I use 3/8" torque wrenches in both in./lbs. and ft./lbs.- most of my sockets and deep sockets are 3/8" and I really don't see a need for 1/2" for the work I am likely and willing to do.
You need a 1" for the 190-210 ft-lb nut on the mainshaft when changing out your rotor or stator, therwise 3/8", you can get 1/4 to 3/8 adapters for any sockets that are 1/4 & require in-lb torque.
I got 1/4" in lb 3/8" ft lb - both clickers and 1/2" guage $15 each at Harbor Freight. Yea I know - They are cheap Chinese s***, but so am I (but not chinese)
I recently bought a 1/4" in. lbs. from Harbor Freight. Before I applied it to my bike, I tested this on a bolt already on some exercise equipment. I set it around 80 in. lbs. I kept applying more and more pressure, the metal which the bolt was attached to actually started to bend. This thing wouldn't click! Then I said #$# it, and applied a great deal of pressure, then it became disengaged and clicked about 20 times. I took it back.