You would want a relatively small wrench, so you would want inch-pounds. You could check the torque specs of various fasteners on your bike and pick a wrench with a range covering these. You don't want a wrench with a lower limit that is too close to the lowest of your fasteners. I'm always suspicious that some tools would not be accurate at the bottom of their range. I know that I've used some that weren't.
2003 Specialized Hardrock, 2004 LOOK KG386i, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1
Um, without knowing what you want to torque it's impossible to recommend a torque wrench. Torque wrenches come in many different torque ranges. Typically, one that can be used to torque a stem can't be used to torque a bottom bracket. What exactly do you hope to do with this torque wrench? If you want to do everything, you'll need at least two torque wrenches.