I'm really liking my x-beam ratcheting wrenches.
http://www.sears.com/shc/s/p_10153_1...sName=Wrenches
I have beat the crap out of my Gearwrench brand(sold by sears) and had no problems.
Now I also have a set of the flex heads I'm not too fond of.
http://www.sears.com/shc/s/p_10153_1...sName=Wrenches
They just don't stay locked when using any force.