I would try to get an inch lb. wrench with maximum value of 240 inch lbs. +/-. This will cover 4 to 20 ft. lbs.. Your next wrench should top out at 100 ft. lbs. (20 - 100 ft. lbs.), and your last wrench at 250 ft. lbs., especially if you have truck wheels or ag. equipment.
This provides good coverage of most user needs, unless you get into bigger equipment.
Just my opinion. No matter how you tweak your wrench purchase, you almost always need three to cover all the bases. I suppose 200 in. lb./ 80 ft. lb./ and 150 ft. lb. would work for most with nothing more than cars.
If trying to use a torque wrench for cover gaskets like transmission or valve cover, I learned that once you torque it up to value, i.e. 11 ft. lbs., the gasket compresses and relaxes a bit. If you come back and retorque again to 11 ft. lbs. one or more times, you continue to crush the gasket and will ruin it. I recommend torquing once to the recommended value. After that, if it needs snugging, just do each bolt an equal turn....1/8 to 1/4 turn. Just my experience.