Recently, Harbor Freight has started to offer better grades of tools like their Bauer and Hercules lines, part of their Good/Better/Best concept, in their air tool offerings, they now have the Chief line. I have bought the Chief 4-1/2" angle grinder, an extended cut off grinder, an extended die grinder, a regular die grinder and a 3/8" and 1/2" air drills. I have been very pleasantly surprised by the quality of the tools, they are made in Taiwan, are relatively quiet, smooth and well balanced. Most of the tools are in the $75-$100 price range, the air riveter and extended cut off tools are in the $150 range. Surprisingly for Harbor Freight, the 20% off coupon, does not at this point exclude Chief branded tools, which makes them a bigger bargain.
I have bought some of their cheaper air tools, while never disappointed, but seldom impressed, based on their cost, did performed their job. The Chief line is definitely a big step up, from the Central Pneumatic line. The 1/2" drill is all but a direct copy of the 1/2" Mac air drill (also Taiwan made) I own, is as strong and is somewhat smoother.
I really like the feel of the air riveter, but as I own a Marson, 2 Jets and a Snap-On sourced one, a fifth air riveter seems slight over kill.