Thanks a lot all. I've found this extremely helpful. I've decided that for around $30, I might as well play it safe and buy one. The bike I'm putting together is not expensive by most forum standards I guess, but to me money is money and I don't want to ruin anything. I am brand new to "wrenching" (right term?), and not really mechanical, so it sounds like something that would at least give me some confidence and take away some of the fear of breaking something. (I have a CF/ZR9000 Trek my wife gave me a year or two ago, but I never want to tinker with it for fear of doing more harm than good)

Hopefully this build will help me "build" the confidence and knowledge I'm looking for.

One more torque wrench question. Is it possible to buy one wrench, or do I need two - one for the small stuff and one for the big stuff? (A friend is already coming over with his tools to help me through the BB and Crankset)

Thanks!